PDF malware analysis — malicious · 97c71f5627283351

MALICIOUS

PDF

10.0 KB Created: 2009-10-04 13:45:55 Authoring application: Scribus 1.3.5svn (via Scribus PDF Library 1.3.5svn)

MD5: 911d8a98be7e236d77657fb94f12832b SHA-1: aa3998c29fe18caea7e6fd78677d385edfcd0621 SHA-256: 97c71f56272833514bcdbad90b04cf8961788082a56235e7ba32a144c8b6f6dd

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 JavaScript stream, identified as javascript_obj0013_001.js, is obfuscated using unescape() and String.fromCharCode, suggesting malicious intent. This script is likely responsible for downloading and executing a second-stage payload. Due to the obfuscation, the exact nature of the payload and its ultimate destination cannot be determined with high confidence.

Heuristics 5

unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (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` `86f0355ff370fb224739d35495352cb90a85bdc4907ad3de4df72b5aa6b02000`	pdf-javascript-stream	PDF /JS object 13 at offset 0x1917	14083 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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