PDF malware analysis — malicious · 8f324ffa337b625e

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: b80c8820b03e948b77cfef9eb84a9da7 SHA-1: 74d1d078a0c5b5f93867dfaafd9bba4c5dc112b4 SHA-256: 8f324ffa337b625e642b8639ffd2ad86f2247a482658fa3cf93e42a8e31dcdbb

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 presence of an eval() call and String.fromCharCode usage within the JavaScript stream (PDF_EVAL, PDF_FROMCHARCODE) suggests code obfuscation and dynamic execution. This JavaScript is likely responsible for downloading and executing a second-stage payload, as implied by the suspicious extracted artifact 'javascript_obj0013_001.js' and the heuristic 'Script obfuscation indicators'. The confidence is moderate due to the lack of specific IOCs like URLs or hashes within the provided evidence, and 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` `dbfd0d5da7954073f4ed9dbb499575b784017676d434478a6b9f69e2b0289777`	pdf-javascript-stream	PDF /JS object 13 at offset 0x3D2	12520 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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