PDF malware analysis — malicious · 3d0799221b31cebc

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: bd6b4cbdfa3b335ba308f3049713c556 SHA-1: 5540ee0a07f6138a65137c3a64ea3de0347df2e7 SHA-256: 3d0799221b31cebc7fd427754dc154690af3568d5233d8e7ba67b928e989d036

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 Scripting: JavaScript

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, and PDF_EVAL. The 'eval()' call and 'String.fromCharCode' usage within the decoded stream suggest obfuscated code execution. The presence of 'javascript_obj0013_001.js' as an extracted artifact further supports this. The script's likely intent is to download and execute a second-stage payload, although the exact mechanism is obscured. Confidence is moderate due to the obfuscation.

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` `f8f161f87738a6b937bc1e42fd3bf4711b606ed2a8ade02c7415d283e74937bc`	pdf-javascript-stream	PDF /JS object 13 at offset 0x3D2	12546 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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