PDF malware analysis — malicious · a873800ea24b1139

MALICIOUS

PDF

79.1 KB

MD5: aedf6583c9bc47884af403dad60e98e7 SHA-1: 982cf71afb6f4ab31481ba1f2748a61a43614480 SHA-256: a873800ea24b1139c6633af8ba1f51ae74ce96c4b5a83e28eeb3648e3765d9c7

78 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File

The PDF file contains embedded JavaScript and triggers a known vulnerability, CVE-2009-4324 (media.newPlayer). The embedded JavaScript, particularly in legacy_pdfkit_stage_000.js, is obfuscated but appears designed to download and execute a secondary payload. This indicates a multi-stage attack leveraging a PDF exploit.

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` `cb4fa9114ea68fd20752d33589ab9a4219ff3c1a00c12daa9d56ca48388a6a2c`	pdf-javascript-stream	PDF /JS object 8 at offset 0x1E7	3583 bytes
`legacy_pdfkit_stage_000.js` `16651df8e8df7d935c1bbe6544888e572df5246379bebbf9ec14a474d8e42690`	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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