PDF malware analysis — malicious · fc6650b22212baaa

MALICIOUS

PDF

205.9 KB

MD5: 70d46e10cfd8ef1675571f790d46d6c5 SHA-1: bb42dc88b561c3a6589df8c7bef1239b91f81b32 SHA-256: fc6650b22212baaa3daa548a27aeab644be9914278d568725da45c01977cfa16

78 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF document contains embedded JavaScript, indicated by PDF_JAVASCRIPT and PDF_JS heuristics. A critical heuristic identified the CVE-2009-4324 exploit using the media.newPlayer annotation API. The deobfuscated JavaScript, legacy_pdfkit_stage_000.js, likely facilitates the execution of a secondary payload, as suggested by the 'Suspicious extracted artifact' heuristic. The reconstructed string 'media.newPlayer' is a key indicator of the exploit used.

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` `66f1b8390aa046ef489a352f08f29196171422dea0006ee697a26c18b61a608b`	pdf-javascript-stream	PDF /JS object 8 at offset 0x1E7	2780 bytes
`legacy_pdfkit_stage_000.js` `09e158eb9f164633e8919eca81b915a2627d734bf39a4f2684c68bd4c5f25ca5`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0xCF7	2558 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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