PDF malware analysis — malicious · 33911a567abdaf18

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: 5fa57004a3f5fc01a71bdecd72673e3b SHA-1: fe731d23c7f7325dcabd14ce761ed82221bc3997 SHA-256: 33911a567abdaf18a2db3a99a404dce9bbf878310671541c4e7e642da3d67707

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 PDF_EVAL heuristic firing suggests that the JavaScript uses an eval() call, which is often used to execute obfuscated code. The script 'javascript_obj0013_001.js' was extracted, but its content is heavily obfuscated, preventing a detailed analysis of its specific actions. The primary attack pattern involves leveraging JavaScript within a PDF to deliver a malicious payload.

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` `22fefdc449a8a0794d3c6a00ae659652d62ac7d9a1f761b9222c499e3b7357c2`	pdf-javascript-stream	PDF /JS object 13 at offset 0x3D2	8748 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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