PDF malware analysis — malicious · 90fdff581ad1a4fe

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: d0575bc5f65887c372a45a9003d5e8fe SHA-1: a9249b818452f62d3de288b4e76e7d54c4b9632c SHA-256: 90fdff581ad1a4fe3ce3970afcc25975799c08e440316663293094feed22b7bd

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The PDF_EVAL heuristic firing suggests that the JavaScript code uses eval() to execute obfuscated commands. The presence of 'String.fromCharCode' further supports the obfuscation. The embedded JavaScript file 'javascript_obj0013_001.js' is suspicious due to script obfuscation indicators. The likely intent is to download and execute a second-stage payload, but the exact mechanism is obscured. Confidence is reduced due to the obfuscation preventing a definitive analysis of the script's actions.

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` `cc54e0db39f7ff9e5a8e57a8afd0c4fb74468063de435387ff5628f9fd226ebf`	pdf-javascript-stream	PDF /JS object 13 at offset 0x3D2	12642 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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