PDF malware analysis — malicious · 3a4eddb3c3da1d18

MALICIOUS

PDF

3.3 KB Created: 2008-08-06 01:42:27 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: f2582b76eed4c5c786d9b519280c5a26 SHA-1: 9bc41e252a2b6fa490bd4acbda5dc28bc1d70a72 SHA-256: 3a4eddb3c3da1d1865a9998dbba5eddb5de301bf1cdec9ef2c8f81f9f6b98765

148 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/Shell T1204.002 Malicious File: User Execution

This PDF document contains embedded JavaScript that leverages the CVE-2008-2992 vulnerability, indicated by the util.printf heuristic firing. The ML classifier strongly flagged this PDF as malicious. The JavaScript is obfuscated but appears designed to execute arbitrary code, likely leading to further compromise.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

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.
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits
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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0013_001.js` `eeb6ec05a74988eaa9f148c11998d4be02a7d4d539be230ddde5d71afb0469ec`	pdf-javascript-stream	PDF /JS object 13 at offset 0x3DC	1761 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
`javascript_obj0013_002.js` `c01812dc77aa1087a40ccba312f3fe391e17455b4c1473d1ffe30944f6db9d44`	pdf-javascript-stream	PDF /JS object 13 at offset 0x402	2397 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
`combined_document_js_000.js` `9ccd5ff43e2b8f1e1938df0683505c566453559b4e1de9cc1fad8eda512976a0`	deobfuscated-js	combined document JavaScript streams at offset 0x11	4179 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s). Carved artifact contains 2 long base64-like blob(s).

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