PDF malware analysis — malicious · cb82c1f319608844

MALICIOUS

PDF

40.5 KB

MD5: a5ffa837c67725a0a70d309b69dbe1b6 SHA-1: a0dca47045baf4f7cce92b6c49800ff4e326fe4c SHA-256: cb82c1f319608844caee92d376980e346269e3195acb3da70ce6bd43f23d92d6

78 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript that exploits CVE-2009-4324 using the media.newPlayer function. This exploit is designed to launch a secondary payload, indicated by the presence of deobfuscated JavaScript files. The obfuscated nature of the script and the exploit technique suggest a downloader or dropper functionality.

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` `86002c37d15e23f329d7b4d40359d2c143ffdb0f3be92a4fa6e4996a7e36c340`	pdf-javascript-stream	PDF /JS object 8 at offset 0x1E7	2461 bytes
`legacy_pdfkit_stage_000.js` `ef0e35cb8c5457ba19227b4344632e10b51e16ad1533b2cc631fe6a3c319a18a`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0xBB8	2546 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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