PDF malware analysis — malicious · c119a2bdecd17148

MALICIOUS

PDF

3.5 KB Created: 2008-31-20 53:85:00 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: b25102186cfc2ab207b6ec6b3036c054 SHA-1: 8fc6103490238c69ce0aabf99106216b7e1a7c7d SHA-256: c119a2bdecd17148cc81ed5b4214e2fe7f00a6a64ef6d76ea35206b314ee82ca

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 Command and Scripting Interpreter: PowerShell

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The JavaScript stream, identified as javascript_obj0013_001.js, contains obfuscated code with multiple eval() calls and String.fromCharCode usage, suggesting it's designed to execute arbitrary code. This script likely downloads and executes a second-stage payload. The confidence is moderate due to the obfuscation making precise analysis of the script's ultimate goal difficult.

Heuristics 5

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)
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` `2e53cf7cc200d06b4009f8fa0682a1d9fc8075ee01ff3c5f8516f243fe6f4d01`	pdf-javascript-stream	PDF /JS object 13 at offset 0x3D2	8845 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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