PDF malware analysis — malicious · 3a1265236dd2fae4

MALICIOUS

PDF

79.1 KB

MD5: de4087d094657c99d52ed99da51080a0 SHA-1: 044bb978e2c6a11661b7576e2e70f7ed3c5dfe30 SHA-256: 3a1265236dd2fae47fc3a42bc30c2209f2033349d3720d5a07637df2a8289cd0

108 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1059.001 PowerShell

This PDF file is flagged as malicious by an ML classifier and exhibits multiple JavaScript-related heuristics. Specifically, it leverages the CVE-2009-4324 vulnerability via the media.newPlayer alias to launch embedded JavaScript. The deobfuscated JavaScript, found in legacy_pdfkit_stage_000.js, likely serves as a downloader for further malicious activity.

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` `a2f8f63ed3c6e2410f8e1ef3a88b8088905b4cc21ff5df95cbdbc649d126694b`	pdf-javascript-stream	PDF /JS object 8 at offset 0x1E7	3583 bytes
`legacy_pdfkit_stage_000.js` `45b32239c76897787145f34b324ce5bc925d33cfc1639da99f21711c7c9cf5cc`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x101A	2552 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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