PDF malware analysis — malicious · c69e9a196866dc8d

MALICIOUS

PDF

21.4 KB

MD5: e44ff6fa7c42678121c952d73227e72b SHA-1: a307cf6f4bfd7283da6baa656843ce82e68ff3bc SHA-256: c69e9a196866dc8d98865ae857b12fe669f7608757b0598c3a72198a189e1b39

108 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1059.001 JavaScript

The critical heuristic firing for CVE_2009_4324 indicates exploitation of a known PDF vulnerability. The presence of embedded JavaScript, further confirmed by the ML_NYX_PDF_MALICIOUS heuristic and the extracted JavaScript files, strongly suggests the execution of malicious code. The JavaScript appears to be obfuscated, but the overall intent is to leverage the CVE to download and execute a secondary payload, as indicated by the 'legacy_pdfkit_stage_000.js' artifact.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

Heuristics 4

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)
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.

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0008_000.js` `7558f91ecf9f31b0db1850770b610c7f0d8f13f9df84ee290917a81985fe4581`	pdf-javascript-stream	PDF /JS object 8 at offset 0x1E7	2205 bytes
`legacy_pdfkit_stage_000.js` `c3df0b6d669953258363ab802ac0d32c63d5685d76eb2e0ad1f70f86b924f691`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0xAB8	1256 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_001.js` `42025b552c7960b53abcd8cd732b01c8d109eccfdfefc352b9826c4d5807d414`	deobfuscated-js	cross-stage annotation API aliases at offset 0x1E7	81 bytes

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