PDF malware analysis — malicious · cd133b65be713cdd

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: 8938c5293d9b4b371a45589da2fbcd64 SHA-1: 35c7fcd6cd85efccb07d1652b76b478cf76443ef SHA-256: cd133b65be713cddc61ec2e5e1856040a9a0c0a8185ac3348ba44968b22ccad5

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, and PDF_EVAL. The 'eval()' call and 'String.fromCharCode' usage suggest obfuscation. The extracted artifact 'javascript_obj0013_001.js' is also flagged as suspicious due to script obfuscation indicators. The primary function of the embedded script appears to be downloading and executing a second-stage payload, though the exact URL or execution method is obfuscated within 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` `728d66fd0d1be387676aefa7058a9ed8af370ffdb9ad99db74cceffc37a1b7ab`	pdf-javascript-stream	PDF /JS object 13 at offset 0x3D2	12704 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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