PDF malware analysis — malicious · fa1a2400baa033b5

MALICIOUS

PDF

5.9 KB

MD5: 042a6b55b0c55dc900919eadaa14c763 SHA-1: 13a366ea041f751f8bfe6b44d1ac9f174a265532 SHA-256: fa1a2400baa033b56095ac5c5805794ce7e7941bc6bf925c9768e5af0d67d7b8

178 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File Execution: Malicious File

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. The critical CVE_2008_2992 heuristic suggests exploitation of a known PDF vulnerability. The embedded JavaScript, named 'javascript_obj0006_000.js', is likely responsible for downloading and executing a secondary payload, as suggested by the ClamAV detection and the 'Suspicious extracted artifact' heuristic.

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` `3de9788edbd181e48732443b802b29f862bb311f955b4f08097e5e5e4b8eea72`	pdf-javascript-stream	PDF /JS object 6 at offset 0x19F	5137 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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