PDF malware analysis — malicious · 2c2f66158547a47a

MALICIOUS

PDF

40.5 KB

MD5: 8d5f279228a0faa057fa2bfcf13f084f SHA-1: 9bb025108a6765dbb50a424dd49a4c03f8f606aa SHA-256: 2c2f66158547a47aa36b7b67e25849c06b3709b2ee9245d13b64ba92cb8cd927

78 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript and triggers CVE-2009-4324 via the media.newPlayer annotation. The deobfuscated JavaScript, legacy_pdfkit_stage_000.js, indicates obfuscation techniques and the potential for downloading further payloads. The specific exploit used, CVE-2009-4324, is a known vulnerability for PDF exploitation. The extracted JavaScript is heavily obfuscated, making a precise determination of its actions difficult, but the overall pattern suggests a downloader.

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` `34f33436d67af1922c250d1d4e12d450630fe5fbad132e03a238a6eca83d8a45`	pdf-javascript-stream	PDF /JS object 8 at offset 0x1E7	2461 bytes
`legacy_pdfkit_stage_000.js` `ada8be7fcbbba2749cefe5122fc7e86dce72eb1b6eeddf6c5a324ca92ef02182`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0xBB8	2546 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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