PDF malware analysis — malicious · fe476dfa4f780862

MALICIOUS

PDF

2.9 KB Created: 2007-01-01 11:33:12 Authoring application: Adobe InDesign CS2 (4.0) (via Adobe PDF Library 7.7)

MD5: b8e80129441cb67a5e47a9934e95d3b5 SHA-1: 03dc345073ec876901dad9b09286f84eedaacc54 SHA-256: fe476dfa4f780862493de2dc07c6a7a7d57189bc3b0c263d68079831f9abfb02

178 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1059.001 PowerShell

The PDF file contains embedded JavaScript and is configured with an OpenAction trigger, indicating an attempt to execute code automatically when the document is opened. The critical heuristic firing for CVE-2008-2992, related to util.printf, strongly suggests exploitation of this specific vulnerability. The presence of JavaScript and the exploitation of a known PDF vulnerability point to a malicious document designed to compromise the user's system.

Heuristics 7

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)
OpenAction trigger high PDF_OPENACTION

PDF has an /OpenAction — code runs automatically when opened
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
ASCIIHexDecode filter (with exploit indicators) medium PDF_FILTER_HEX

Hex-encoding filter present alongside exploit delivery indicators — often used to hide payload or shellcode bytes
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_obj0013_001.js` `1d27f0a8096580f7061bb998cc4c5f8c54dd730bdbeb5efeb5074f1b1b46224d`	pdf-javascript-stream	PDF /JS object 13 at offset 0x389	4240 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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