PDF malware analysis — malicious · 94ef33183c165266

MALICIOUS

PDF

79.1 KB

MD5: c9595ddfd1457fcaf6c1836819adc367 SHA-1: 7242c07cb0eee522c93890332e9ae3d094d40d71 SHA-256: 94ef33183c16526600138dfedd4de6e8f86143c5c392d703b6917315a7b83e5d

78 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File Execution: Malicious File Execution

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings related to PDF JavaScript and JS streams. A critical heuristic identified the CVE-2009-4324 vulnerability (media.newPlayer), which is commonly exploited via JavaScript in PDF documents. The deobfuscated JavaScript, named legacy_pdfkit_stage_000.js, likely facilitates the execution of a secondary payload, although its specific actions are not fully detailed in the provided evidence. The document body content is not indicative of a specific lure.

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` `e1c5264f07da0e37382625c215a741aa45e449a5b62c02465d9729b5983148d3`	pdf-javascript-stream	PDF /JS object 8 at offset 0x1E7	3583 bytes
`legacy_pdfkit_stage_000.js` `b5357306cfb10a2f5c2f33c6b40440fc3ecd841bd90a4cfdd9f700a7d9c0b30d`	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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