PDF malware analysis — malicious · c306f3e68ec5637a

MALICIOUS

PDF

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

MD5: 998fb3b3aec4220219dbfc72f9f974d8 SHA-1: 16c3a3e9bb67df2ce81568fc82946fad91f4fd60 SHA-256: c306f3e68ec5637a8951c8f465cee6533d60c16d2bb6498359220272ac9478f1

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 presence of a PDF_EVAL rule firing and the use of String.fromCharCode suggest that the JavaScript is obfuscated and likely intended to execute arbitrary code. The extracted artifact 'javascript_obj0013_001.js' further supports the presence of malicious script content. The overall intent appears to be the execution of a second-stage payload, typical of a downloader or dropper malware.

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` `b3d562835d031648c4599c72b0f58b327a304ab019c80286b580ebbef8a2e229`	pdf-javascript-stream	PDF /JS object 13 at offset 0x3D2	13100 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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