PDF malware analysis — malicious · 1f62f0cacae8e90d

MALICIOUS

PDF

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

MD5: ff0d48906e793e1ff6fd37f3e64124cd SHA-1: fbc8fb41bc57931df404187cb1c8fe90396adbe1 SHA-256: 1f62f0cacae8e90d4a8d31f5b1677d7bc9c820872ae25854d90227b99c6585f7

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 PDF_UNESCAPE and PDF_FROMCHARCODE heuristics suggest that the JavaScript is obfuscated. The extracted artifact 'javascript_obj0013_001.js' is also flagged as suspicious due to script obfuscation. The primary attack pattern involves the execution of this obfuscated JavaScript, likely to download and execute a secondary payload.

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` `0feba787a1cac1fd2e9eb458e7727b2348fbbb8e3ba7cf2776243c52cb38eca0`	pdf-javascript-stream	PDF /JS object 13 at offset 0x1917	11283 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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