PDF malware analysis — malicious · 83c8ea747b998870

MALICIOUS

PDF

14.4 KB Created: 2008-07-26 19:43:58 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: e570521bbb02be316d2203cb603b5eec SHA-1: 261e452062c6bee72e37474ea9e9a3caf03a8580 SHA-256: 83c8ea747b998870cd2db199b651987fba6d0b61e23fcdf656451a590f955496

148 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file was flagged as malicious by a ClamAV signature (Pdf.Exploit.Agent-36118) and an ML classifier. Heuristics indicate the presence of embedded JavaScript with eval() calls, suggesting an attempt to execute arbitrary code. The embedded JavaScript is heavily obfuscated, but the presence of eval() and string concatenation points to dynamic code execution, likely for downloading and running a second-stage payload.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

ClamAV: Pdf.Exploit.Agent-36118 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36118
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution
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.
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_000.js` `599e80765eac8fb9fa079216f8823165cb8deb0c2806c28ef033c3121b26c368`	pdf-javascript-stream	PDF /JS object 13 at offset 0x336	13187 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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