PDF malware analysis — malicious · eaf01a8359f1bfcf

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: 87416a713d32591f3031693ff1a70509 SHA-1: ee5320ed5195e42d6c6fd394f56ddd931ccfb2cc SHA-256: eaf01a8359f1bfcfaf6c5cbc480231cce37b2fc6095d35342e1777a88ac297dc

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by PDF_JAVASCRIPT and PDF_JS heuristics. A high-severity PDF_EVAL heuristic firing suggests the use of eval(), and PDF_FROMCHARCODE indicates string manipulation, both common obfuscation techniques for malicious JavaScript. The extracted JavaScript file, javascript_obj0013_001.js, is flagged for script obfuscation. The presence of eval() and String.fromCharCode points to the script attempting to dynamically construct and execute code, likely to download and run a second-stage payload. The confidence is moderate due to the obfuscated nature of the script.

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` `324c65dd5192a0d9cdc8e594e882f376971eefa0763e0d41761221c969b848ab`	pdf-javascript-stream	PDF /JS object 13 at offset 0x3D2	12518 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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