PDF malware analysis — malicious · f6c81c54c8dee8ae

MALICIOUS

PDF

3.4 KB

MD5: bfb5a52ff8b02865fac2867e9de794d7 SHA-1: 2738c4a1fe29dc6cf3b92c4bc654cc6d2a9f6374 SHA-256: f6c81c54c8dee8ae3892ad39dce73d0b2aba9ef0c33fc3af6ef57d2e8d5b32e1

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. A critical heuristic identifies the CVE-2009-4324 vulnerability related to media.newPlayer, suggesting the JavaScript is used to exploit this flaw. The JavaScript stream is obfuscated, as noted by PDF_UNESCAPE and ClamAV's Heuristics.PDF.ObfuscatedNameObject detection. The primary intent appears to be the execution of this obfuscated JavaScript, which is likely designed to download and execute a second-stage payload.

Heuristics 6

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. (matched in decompressed stream)
ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION

ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
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 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0006_000.js` `75b6008d689ca75314aa945b58018d0b161103b62e06ef1437d1c9b1b8ca469e`	pdf-javascript-stream	PDF /JS object 6 at offset 0x19F	2347 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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