PDF malware analysis — malicious · f7ed4a4ba035a29b

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: 5b5cef83a43d3f66b3f2e331abe3cbdc SHA-1: ef70b6ee5a7d7ab890ec0ab9f83b2af3ee0ea831 SHA-256: f7ed4a4ba035a29b09b78a55262cf5a688a2adde1df000eab21fa1a0fcc6f023

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 an eval() call and String.fromCharCode within the decoded JavaScript stream (PDF_EVAL, PDF_FROMCHARCODE) strongly suggests that the script is designed to execute arbitrary code. This is further supported by the 'Suspicious extracted artifact' heuristic flagging script obfuscation indicators. The script's likely intent is to download and execute a second-stage payload, a common technique for malware delivery. 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` `67c8046d7a0728afef8aec0f39a6909226a7108fe7ad36657e8ef2c5e88df63f`	pdf-javascript-stream	PDF /JS object 13 at offset 0x3D2	12475 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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