PDF malware analysis — malicious · 3a3f8d6ab00cc1c3

MALICIOUS

PDF

7.9 KB Created: 2009-09-10 19:43:35 Authoring application: Eblasha 9.4.2.9 (via PDF Library 2.9.8.1)

MD5: ffe21c5f4ceca0eaaeebaae4b5360eb8 SHA-1: 7af689db170e771eb23068da0d0eb71be9f7cb3f SHA-256: 3a3f8d6ab00cc1c3477926a6f3fbaf5bece9ac2a0b83cfc05e469800dacb88aa

134 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious File

The file is a PDF containing embedded JavaScript, as indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. The critical ClamAV_DETECTION heuristic for 'Pdf.Exploit.Agent-30226' strongly suggests exploitation of a known PDF vulnerability. The presence of PDF_EVAL and PDF_FROMCHARCODE points to obfuscated JavaScript code within the document, which is likely responsible for downloading and executing a secondary payload. No specific family could be identified, but the attack pattern is consistent with a malicious PDF dropper.

Heuristics 7

ClamAV: Pdf.Exploit.Agent-30226 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-30226
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (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.
String.fromCharCode low PDF_FROMCHARCODE

String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape rules. (matched inside decoded stream)
ASCII85Decode filter (with exploit indicators) low PDF_FILTER_85

ASCII85 encoding filter present alongside exploit delivery indicators — uncommon outside of obfuscation
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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0013_000.js` `03c9dcf5cfdbe5433d77209d02cd3e043772acc41da66c5f0cb905c5a6946f55`	pdf-javascript-stream	PDF /JS object 13 at offset 0x36B	21151 bytes
`javascript_obj0015_001.js` `e13811687e08c47a5dcf3a38214724e8ab914b5a75cb8470b42d1cc1d35e9270`	pdf-javascript-stream	PDF /JS object 15 at offset 0x1B68	211 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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