PDF malware analysis — malicious · e9a8c8f94cb990ef

MALICIOUS

PDF

4.5 KB Created: 2010-06-23 09:24:19 Authoring application: Scribus 1.3.3.13svn (via Scribus PDF Library 1.3.3.13svn)

MD5: 6885b96ff83e08d3ff82ffd2c18e7201 SHA-1: f670ce9b03ddea909015361212fea204317a119d SHA-256: e9a8c8f94cb990ef603e54c4a56327caf3be2928efe64364800c0193d3319494

158 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript that is triggered by the OpenAction feature, indicating an attempt to exploit a known vulnerability. The critical heuristic firing for CVE-2008-2992, specifically mentioning the util.printf function, strongly suggests this exploit. The embedded JavaScript stream, identified as 'javascript_obj0013_001.js', is likely responsible for executing the exploit payload.

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)
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)
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` `4cd25390344b693e14fb7d354a6390aed1d9199fe1aa489d92a6dda835d14bd0`	pdf-javascript-stream	PDF /JS object 13 at offset 0x947	4041 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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