PDF malware analysis — malicious · cdb9a514c88229f3

MALICIOUS

PDF

2.9 KB Created: 2007-11-12 02:04:55 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: 46ff460fff343c5b8410b2c6933119a3 SHA-1: 23bc8733c52a3d23395acd5c73d1533d8248977b SHA-256: cdb9a514c88229f3194fd4cc5387a4e441f4cececb9f1e222888d5650bb86bed

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.007 JavaScript

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, and PDF_EVAL. The JavaScript stream, identified as 'javascript_obj0013_001.js', is heavily obfuscated and uses String.fromCharCode, suggesting it's designed to download and execute a secondary payload. The presence of eval() further supports the dynamic execution of obfuscated code. Due to the obfuscation, the exact nature of the payload and its final destination cannot be determined from static analysis alone.

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` `e7348ac0e5c4e7048af7f69bafd33c839b8cf0a2a6f00c5f46a5cded9a75e96d`	pdf-javascript-stream	PDF /JS object 13 at offset 0x36C	6581 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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