PDF malware analysis — malicious · c1d6b9933af8b8de

MALICIOUS

PDF

139.9 KB

MD5: 4a5a797504532979289267619709430c SHA-1: 55d09e8e914d9dc38a1406cda5309642d12e0d5f SHA-256: c1d6b9933af8b8dea7a7133bb01f0c004e25c1950433072ca36b71797e55d0cc

136 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1059.001 PowerShell

The PDF file contains embedded JavaScript that leverages the CVE-2009-4324 vulnerability in Adobe Reader. The heuristic firings indicate obfuscated JavaScript and the use of unescape() calls, typical for exploit delivery. The deobfuscated JavaScript is minimal, suggesting it acts as a loader for further malicious activity, likely downloading and executing a second-stage payload.

Heuristics 5

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)
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
Suspicious extracted artifact medium 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.
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.

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0008_000.js` `216d967b8474d0a3b8e7fd01582c01b1149d72cf486e0473ca1c5dee98dde808`	pdf-javascript-stream	PDF /JS object 8 at offset 0x210	2195 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 1 long hex-escaped blob(s).
`legacy_pdfkit_stage_000.js` `42c3f4df375ff6f58ff655cc4f88b5cc28f0dd33b978390db3538684a6219b74`	deobfuscated-js	string-concatenation normalized Acrobat API aliases at offset 0x210	126 bytes

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