PDF malware analysis — malicious · 22acd3e87bb32499

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: 5c8c3ade7f8afc0fd79ccf0b632dcfa4 SHA-1: ddfc3626858f658d5ea78f30493b8413c985b0e6 SHA-256: 22acd3e87bb3249994ea6a16aa4136c76ead6af89967ad164abd8db6af3fc29f

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 JavaScript stream is obfuscated and utilizes eval() and String.fromCharCode() functions, suggesting an attempt to hide malicious code execution. This obfuscated script is likely responsible for downloading and executing a second-stage payload. The file's metadata indicates it was authored using Scribus, but this is not directly indicative of malicious intent.

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` `ab85b50168eb6a39a01b98a3961acc24ca609889c22d74baf10b694b882d3d6e`	pdf-javascript-stream	PDF /JS object 13 at offset 0x3D2	12484 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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