PDF malware analysis — malicious · 586d6be9b6481e85

MALICIOUS

PDF

92.2 KB

MD5: e28f28383b67ede04f3d699c3d7f0e8a SHA-1: bda7130ef298b77d2ed9cd7f7a77fddb4f99b192 SHA-256: 586d6be9b6481e859e0b8679dbe11ddc2058fda0e1d02dfbd43e52478370789d

108 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1059.001 JavaScript

The critical heuristic firing for CVE-2009-4324 indicates the PDF is designed to exploit this vulnerability via the media.newPlayer API. Embedded JavaScript streams were detected and one was deobfuscated, confirming the presence of malicious script. The ML classifier strongly flagged this PDF as malicious. The script's obfuscated nature and the exploit target suggest it's a downloader for a second-stage payload.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

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` `7f7fd8584f48cc44b78a2589daec03228291913b613a656cd6a192cb0221d281`	pdf-javascript-stream	PDF /JS object 8 at offset 0x1E7	2578 bytes
`legacy_pdfkit_stage_000.js` `fbac795adc7cea718b8ae4b1ca8e9752f7cbfedaf4162134e8d0fb8d72150ac6`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0xC2D	2528 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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