Malicious PDF / .XXX — malware analysis report

Static analysis result for SHA-256 658ecc102e1003db…

MALICIOUS

PDF / .XXX

5.7 KB Created: 2009-01-35 62:12:26 Authoring application: Adobe
MD5: d3cbeb227e1fa49972f65b3992f94776 SHA-1: d057d286cfbe92cb278d2f03bb09ea80d9ec7af9 SHA-256: 658ecc102e1003dbd844a599e54bff4224eeb8f0061d35ee3c5b3556c8a29171
650 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF contains JavaScript that leverages multiple known Adobe Reader vulnerabilities, including CVE-2009-4324, CVE-2009-0927, and CVE-2007-5659, to execute code. The embedded JavaScript explicitly contains URLs that are used to download a second-stage payload, indicating a downloader functionality. The ClamAV detection of 'Pdf.Exploit.Agent-13509' further supports the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 15

  • 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)
  • 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.
  • PDF JavaScript exploit cluster critical PDF_JS_EXPLOIT_CLUSTER
    PDF combines an executable JavaScript/action surface with exploit staging indicators such as eval/unescape/fromCharCode, XFA script content, or a related CVE pattern. Benign form JavaScript remains low-severity, but this correlated cluster is high-confidence malicious behavior.
  • 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.
  • ClamAV: Pdf.Exploit.Agent-13509 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-13509
  • ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV
    ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
  • eval() call high PDF_EVAL
    eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
  • unescape() call high PDF_UNESCAPE
    unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
  • PDF JavaScript shellcode contains an embedded download URL high PDF_JS_SHELLCODE_DOWNLOAD_URL
    Decoded PDF JavaScript shellcode contains a hardcoded http(s) URL stored as little-endian %uXXXX Unicode escapes. Reader exploit shellcode embeds the second-stage fetch URL this way and pulls it down with a urlmon/URLDownloadToFile-style download-and-execute (commodity downloader behaviour rather than a specific Acrobat CVE).
  • JavaScript action low 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://endtest0t.in/at_gglo/load.php?spl=pdf_new
    • http://endtest0t.in/at_gglo/load.php?spl=pdf_pack

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0032_000.js
df390299bdd831fc8be718db8d08032c756c243e70bf349f1d8d5d6fdfb20860		 pdf-javascript-stream PDF /JS object 32 at offset 0x3DE 177 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 2 eval/decoder/string-building token(s).
javascript_obj0034_001.js
4f6de108885b310a1d76880ca4f2763bbe14cb299aed36e2147c8e13743a00a3		 pdf-javascript-stream PDF /JS object 34 at offset 0x4C4 125 bytes
javascript_obj0036_002.js
aa224d349b53222f594a522cf1fc0589df13dc1fe867817d033e1bf3ee84c14a		 pdf-javascript-stream PDF /JS object 36 at offset 0xF1 131 bytes
javascript_obj0038_003.js
cfedd7e6fa4c2d56597d02e048576fc42d4f939dfd0f857ecb5bfd6117bffd54		 pdf-javascript-stream PDF /JS object 38 at offset 0x1407 165 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 eval/decoder/string-building token(s).
javascript_obj0078_004.js
81a65892726b4ad6df9ed7b6d82ae81ae517e081c1dcca76cf11c1a458efc84e		 pdf-javascript-stream PDF /JS object 78 at offset 0x73 42 bytes
legacy_pdfkit_stage_000.js
72fc3ed3b4c04bfcf4dcef1acbd44451738b8f8ba57c2a2c8ad9ca21296e11dc		 deobfuscated-js repeated-marker hex decoded JavaScript at offset 0x5A9 6429 bytes
Detection
ClamAV: Js.Exploit.Shellcode-18
Obfuscation or payload: likely
Carved artifact contains 12 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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