PDF malware analysis — malicious · 946ca4c677218fbe

MALICIOUS

PDF

43.3 KB

MD5: ece798c884c395e13c034a8da9b5a6a9 SHA-1: b10378374f7a65fa1713a5ead61ec16885417108 SHA-256: 946ca4c677218fbed6de2b269c5f5433e1e3075b6ad337d55a8d57692fb7cf06

108 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript and triggers a known vulnerability, CVE-2009-4324 (media.newPlayer). The embedded JavaScript is obfuscated but appears to be designed to download and execute a secondary payload. The ML classifier strongly indicates maliciousness. The specific exploit and obfuscated script suggest a downloader or initial access stage.

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` `a7070f04e9bc09b2f9cdfb14cdb66927ef7985af8234cbf4947e52615118637f`	pdf-javascript-stream	PDF /JS object 8 at offset 0x1E7	2221 bytes
`legacy_pdfkit_stage_000.js` `34724b4176b0e989bf73d0fc9ae205c6fc8236b3698a34a94365aab3ab91b629`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0xAC8	2756 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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