PDF malware analysis — malicious · 3067ad978b3086ba

MALICIOUS

PDF

3.5 KB Created: 2008-31-20 53:85:00 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: bacf820483dfe9da804d517ba5ee28a7 SHA-1: 720610cb060ecbaaee901e5ba4d07b53afa2cefa SHA-256: 3067ad978b3086baad18257c5a4597825bbbdefd0236ea79c1e5b4798c77534f

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 Command and Scripting Interpreter: PowerShell T1059.003 Command and Scripting Interpreter: Windows Command Shell T1059.007 Command and Scripting Interpreter: JavaScript/TypeScript

The PDF contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The JavaScript stream is obfuscated and utilizes eval() and String.fromCharCode, suggesting it's designed to execute arbitrary code. The primary heuristic firing is PDF_EVAL, confirming the use of eval(). The embedded artifact javascript_obj0013_001.js is likely the payload. The obfuscation and use of eval() point to a downloader or dropper functionality, but the exact second-stage payload cannot be determined from the provided evidence.

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` `1015ce8c5361dffad3df8dc70a39fe35f849559f7ea4ac095a3c9bdb528873dc`	pdf-javascript-stream	PDF /JS object 13 at offset 0x3D2	8880 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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