PDF malware analysis — malicious · f0cc839645efd12f

MALICIOUS

PDF

21.4 KB

MD5: 716be75546aab4a706e4e6bbccf911be SHA-1: 9162c14dfd16497dbd00fec5d352e93d7fc6c6e1 SHA-256: f0cc839645efd12f6bd03673669cf54cc401155f6b08ea44c7830c6142b13dcc

78 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1059.001 JavaScript

The PDF file contains embedded JavaScript and triggers a critical heuristic for CVE-2009-4324, indicating exploitation of a vulnerability related to media player aliases. The embedded JavaScript, particularly the deobfuscated 'legacy_pdfkit_stage_000.js', likely facilitates the download and execution of a second-stage payload. The obfuscated nature of the script and the use of a known exploit suggest a downloader or dropper functionality.

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` `e2a3a3de9f7c4a3ff47dcb615bfe8445489c35a5901f7553eebf05c653a17ddc`	pdf-javascript-stream	PDF /JS object 8 at offset 0x1E7	2205 bytes
`legacy_pdfkit_stage_000.js` `c3df0b6d669953258363ab802ac0d32c63d5685d76eb2e0ad1f70f86b924f691`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0xAB8	1256 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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