PDF malware analysis — malicious · 77c8c75eabd90b8a

MALICIOUS

PDF

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

MD5: a61456a5f1cfcebdb8297fe9c05e7238 SHA-1: b9a72ff8b1a6325c222dd1465163aabb03856c89 SHA-256: 77c8c75eabd90b8a316efb44cd6d1dd57ab7509c85f185fb3e549e4edb15f09b

148 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF sample contains embedded JavaScript that utilizes eval() to execute obfuscated code. This script is designed to download and execute a second-stage payload, as indicated by the ML classifier and ClamAV detection. The specific JavaScript execution pattern suggests a downloader or exploit delivery mechanism.

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` `8493dda5dc9455c27926a9eb7ddbf33761cc027969329e004cad1cd81e7bdaab`	pdf-javascript-stream	PDF /JS object 13 at offset 0x336	13549 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 14 long base64-like blob(s).

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