PDF malware analysis — malicious · 32c437c114747a44

MALICIOUS

PDF

15.8 KB

MD5: ee2f9c356d67d4cdeaec4ecba5b7237b SHA-1: b1461b48a3cb0c5f1008515aae20b3608b5f68f0 SHA-256: 32c437c114747a440ce8f9608f8c976a4d2e2f79d9baf7361d50a38bb515f020

148 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF sample contains obfuscated JavaScript, including multiple calls to eval() and unescape(). Static analysis identified a critical CVE-2009-4324 trigger related to media.newPlayer, indicating exploitation of a known Adobe Reader vulnerability. The deobfuscated JavaScript stages suggest the primary intent is to download and execute a secondary payload, characteristic of a downloader or initial access exploit. The confidence is high due to the critical exploit firing and clear obfuscation techniques.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

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)
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution
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 6

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj111711_000.js` `7f912617cd9e1085dd975a1ed655e1e8644893342774e76d015f156cbfbc5f48`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	2942 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 6 long base64-like blob(s).
`javascript_obj111712_001.js` `6900b2fb3d815a2d7e757af9633ee5f1915025b811dfbb8f6c905d42a6e7568a`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xD42	10351 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 5 long base64-like blob(s).
`javascript_obj111713_002.js` `06d3eabbd298644c817a44cabc908ab4ad84edabcb008f1d3313ace2959b01bf`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x35E7	2335 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 6 long base64-like blob(s).
`legacy_pdfkit_stage_000.js` `3cece914b914841a8b17f6d40f0553e78ef8ed60e76aa68605abeae7e560099e`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0xD42	1081 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` `208ad2dac2bb82ff8130cc527e2b347479ed5e63142633d911d4191d6359ae1c`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x35E7	168 bytes
`legacy_pdfkit_stage_002.js` `c05a89d2e168b75852584911511210840f60a0695af076f8530f6d01ea37fe6b`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0xD42	1250 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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