PDF malware analysis — malicious · b5a0a927cb93a293

MALICIOUS

PDF

7.1 KB

MD5: 67bdd61a96ed69e5191d491f28ca2193 SHA-1: 261d3bb75ade53eaa535157e905a63bf015faef0 SHA-256: b5a0a927cb93a293307841d721629de582c67d7eaf552c6d22ff3aa0dbbb3358

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. A critical heuristic identified the CVE-2008-2992 exploit (util.printf), suggesting the JavaScript is used to trigger this vulnerability. The presence of an obfuscated JavaScript stream and ClamAV's detection of 'Heuristics.PDF.ObfuscatedNameObject' further support a malicious intent. The primary attack vector appears to be exploiting CVE-2008-2992 to execute arbitrary code, likely for downloading additional malware.

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` `a58b90882364d67ba0d155834eecc0e193caae6b91c30fcfd31572023b299798`	pdf-javascript-stream	PDF /JS object 6 at offset 0x1B9	5958 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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