PDF malware analysis — malicious · 15e2d6ac2f94feff

MALICIOUS

PDF

7.3 KB Created: 2009-01-35 62:12:26 Authoring application: Adobe

MD5: e1410aa758979c3fa2ab85eca71380bb SHA-1: c4d4fc7d8a69f74856d64809f596e387af20649e SHA-256: 15e2d6ac2f94feff3fb158292723f45b3846d0b885f1829a1ae3720a4415fb9d

470 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.007 JavaScript

The sample is a PDF file that leverages multiple JavaScript exploits, including CVE-2009-4324, CVE-2009-0927, and CVE-2007-5659, to execute arbitrary code. The embedded JavaScript contains URLs that are likely used to download and execute a secondary payload, as indicated by the 'PDF_JS_SHELLCODE_DOWNLOAD_URL' heuristic and the ClamAV detection 'Pdf.Dropper.Agent-7232602-0'.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 12

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)
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.
ClamAV: Pdf.Dropper.Agent-7232602-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7232602-0
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://state-co.net/e/load.php?spl=pdf_new
- http://state-co.net/e/load.php?spl=pdf_pack

Extracted artifacts 8

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0032_000.js` `8d476adc7b4a9419a1a7105f0cca606284ad023b042031c5a7f659336d764628`	pdf-javascript-stream	PDF /JS object 32 at offset 0x424	133 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj0034_001.js` `a42714c9220ec4ac78e7143d2ce5fdeff4e9f9fc43480eff7a4fb33f40d97545`	pdf-javascript-stream	PDF /JS object 34 at offset 0x4E2	136 bytes
`javascript_obj0036_002.js` `e99298d0d9e6859a05e22e6b16e33e7a50b99d8caffa3d9be8a2696b1b8361d2`	pdf-javascript-stream	PDF /JS object 36 at offset 0x107	153 bytes
`javascript_obj0038_003.js` `84d2c787aa00cd2885f297cfbfea07bd0f2c237796a821deacf6226e361f9ce0`	pdf-javascript-stream	PDF /JS object 38 at offset 0xC49	174 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj0078_004.js` `b8a9a0be83b72e1c5ef7f5a25cb9c166c7a386ed953365c4b3bab21dfaca412a`	pdf-javascript-stream	PDF /JS object 78 at offset 0x7C	45 bytes
`legacy_pdfkit_stage_000.js` `053e984286dab9095d453ae4538fb3b4461f210f0f7e1f62210c9d009394bde8`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x5D7	1634 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_001.js` `cd6d2020fefd8008aac1a45a38a3ac2119dddcf2723e03daa80238880e02a64b`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0xD81	1800 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_002.js` `27bbc003e3ca7df9633bc1ed62b4ce00cc47387ac0140467db9d151c0167bbc5`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x13EA	2938 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 6 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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