PDF malware analysis — malicious · 9859ac055092600d

MALICIOUS

PDF

5.8 KB Created: 2009-09-05 12:48:00 Authoring application: Scribus 1.3.5svn (via Scribus PDF Library 1.3.5svn)

MD5: 6b394ca356f7318eeccb5b95146222c5 SHA-1: 3a103126f1a6a8c90e34f8e071f2995b8f01240e SHA-256: 9859ac055092600d77064167482c0c59f459caed86553b1f2aadb847756717d8

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1559.001 Component Object Model

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including 'PDF_JAVASCRIPT' and 'PDF_JS'. The 'PDF_UNESCAPE' and 'PDF_FROMCHARCODE' rules suggest obfuscation techniques were used within the script. The extracted artifact 'javascript_obj0013_001.js' is likely the payload. The script's execution, facilitated by PDF vulnerabilities, points to a malicious intent, such as downloading further malware or exploiting the system.

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` `8404ad6906805fd8dbb2dd5fab2b36d2697456006e719144a724b9e61468b2d3`	pdf-javascript-stream	PDF /JS object 13 at offset 0xBFC	10161 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 6 eval/decoder/string-building token(s).

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