PDF malware analysis — malicious · 548a89ec63a6df90

MALICIOUS

PDF

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

MD5: 1d41c9a959ecb4280706c5876ab2f430 SHA-1: d9d2b02dad857353c850da35a9ef0dc2391a2b5a SHA-256: 548a89ec63a6df90589daba3535a001c81f463aa3d9e1e1a46d1373c4cbcc8b2

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

This PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, PDF_EVAL, and PDF_FROMCHARCODE. The JavaScript stream is obfuscated and uses eval() and String.fromCharCode, suggesting it is designed to execute arbitrary code. The primary intent appears to be the execution of a second-stage payload, though the exact nature of the payload cannot be determined due to obfuscation. No specific malware family could be confidently identified.

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` `39e9812d618ea57e06d066c4331f7396324ce5d2b05675631ce2913deca13728`	pdf-javascript-stream	PDF /JS object 13 at offset 0x3D2	12699 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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