PDF malware analysis — malicious · b5a8a26fa825575e

MALICIOUS

PDF

73.5 KB Created: 2010-03-04 02:58:46 Authoring application: X6neqaSPHHYgzS (via PHmT8)

MD5: 46d98efb4654bc5407d55b28d9b14ad2 SHA-1: 614d32c5e43956e3afdb9027d3d88d9b39d68a90 SHA-256: b5a8a26fa825575ecc123f35246338f2bd934e1b36423c9b97fe16bd52b95ee9

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.007 JavaScript

The PDF file contains embedded JavaScript, indicated by PDF_JAVASCRIPT and PDF_JS heuristics. The JavaScript stream includes an eval() call, a high-severity finding, suggesting code execution. The obfuscation and use of String.fromCharCode further point to malicious intent. The primary attack pattern involves executing obfuscated JavaScript to likely download and run a secondary payload.

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.
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_obj0007_000.js` `8b346693e4db0a57fcec01d624091b5efebe51cbf7927688142bf8657ec39b8e`	pdf-javascript-stream	PDF /JS object 7 at offset 0x23D	74034 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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