PDF malware analysis — malicious · 8b780a688682891d

MALICIOUS

PDF

14.6 KB Created: 2008-07-26 19:43:58 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: 4bf7c9ac95ec3d07912cee11a2ea358c SHA-1: 4d0879f48d8fe241627922baf0867ba7e6bbdfcf SHA-256: 8b780a688682891d4f3e96443d99d8ea3c29482e877e69c46389a35397d8a161

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

This PDF file contains embedded JavaScript that utilizes an eval() function, a common technique for obfuscating malicious code. The ClamAV detection 'Pdf.Exploit.Agent-36118' and the heuristic firing for 'PDF_EVAL' strongly suggest the exploitation of a PDF vulnerability. The JavaScript is heavily obfuscated, but the presence of eval() and the overall structure indicate it's designed to download and execute a secondary payload. The document body text appears to be a highly obfuscated string concatenation, further supporting the malicious intent.

Heuristics 5

ClamAV: Pdf.Exploit.Agent-36118 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36118
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution
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_000.js` `d3811df2916d32f1ecebffecc2b6c5690b808a68760e0bd3d660eb9f1a7ef904`	pdf-javascript-stream	PDF /JS object 13 at offset 0x336	13388 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 19 long base64-like blob(s).

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