PDF malware analysis — malicious · 4523f839ae0a7e1d

MALICIOUS

PDF

3.2 KB

MD5: a7aba060e9e16e7037140d97fabec721 SHA-1: 463644ab8e983614e06cd2fd570505e56a637111 SHA-256: 4523f839ae0a7e1dc2c66786fa6abd4d8edc6ee1f83fcc2363761045e8d24f51

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, which is obfuscated and utilizes the unescape() function. A critical heuristic firing indicates exploitation of CVE-2009-4324 via media.newPlayer, suggesting the JavaScript is used to trigger this vulnerability. The embedded JavaScript is likely intended to download and execute a second-stage payload, though the exact mechanism is obscured. ClamAV also flagged this as Heuristics.PDF.ObfuscatedNameObject.

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` `b2aa5fbdbbc828116c0db70d4a787ce123ae23c847fe7630e4d335bb9f62a328`	pdf-javascript-stream	PDF /JS object 6 at offset 0x1A7	2220 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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