PDF malware analysis — malicious · 4c2af546c797e2ed

MALICIOUS

PDF

6.1 KB

MD5: 37c5af3b76bf92398044bd67b5b0b8a5 SHA-1: 2d13180a45513511c03e0f928b93b2fa503237cc SHA-256: 4c2af546c797e2eda8b473201f378dc63c11665cf8bf4c2b04d226db948da718

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The presence of the CVE-2008-2992 exploit firing, specifically mentioning util.printf, strongly suggests this vulnerability is being leveraged. The unescape() call further points to obfuscated JavaScript intended to download and execute a secondary payload. No specific family could be identified, but the exploit and obfuscation are common in PDF-based malware delivery.

Heuristics 6

util.printf — CVE-2008-2992 critical CVE exact CVE_2008_2992

PDF JavaScript calls util.printf() — CVE-2008-2992 is a stack buffer overflow in Adobe Reader triggered by a long format-specifier argument. Widely exploited in the wild after disclosure. (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` `dd1c09df4fe85abd71db7a0f4468759c768c77e5db852196ccbf1f723c17402a`	pdf-javascript-stream	PDF /JS object 6 at offset 0x19F	5360 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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