PDF malware analysis — malicious · 3d8eb3aa23da6a91

MALICIOUS

PDF

21.4 KB

MD5: c5559dc306ac40ee6188fd232168e2d6 SHA-1: 776ccf9ff90cef2e861cc852d5fcb2623510aed2 SHA-256: 3d8eb3aa23da6a916d476ab3666da7cbe96bd9d0eebed6e8bbcc23255e663abe

78 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1059.001 JavaScript

The PDF document contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The critical CVE_2009_4324 heuristic specifically points to the exploitation of a vulnerability related to media.newPlayer, which is often used to launch malicious scripts. The deobfuscated JavaScript, named legacy_pdfkit_stage_000.js, likely facilitates the execution of further malicious code, such as downloading a second-stage payload. The presence of obfuscation indicators in the extracted artifact further supports a malicious intent.

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` `b9036cf1d1d43e3f42ffd7228436f2e4f6fb6b967b9990c512d350baf208a4a7`	pdf-javascript-stream	PDF /JS object 8 at offset 0x1E7	2205 bytes
`legacy_pdfkit_stage_000.js` `630bbd87d4c991442612bbfc5d0e64a58d98100212c3f8e897f80b45684ffd16`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0xAB8	1262 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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