PDF malware analysis — malicious · 950dd6243c2e3671

MALICIOUS

PDF

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

MD5: 9a1a7d698b6742189901fa4916526749 SHA-1: bfbbd6e8442c30ca9d5f929c853a042aa4d7d889 SHA-256: 950dd6243c2e367112a985e1ba0e61101ef4dd9ba94e08ca99f406e95eacd3d0

148 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The sample is a PDF file that contains embedded JavaScript. Heuristics indicate the presence of JavaScript actions, embedded JS streams, and a critical eval() call, strongly suggesting code execution. The ML classifier and ClamAV detection further confirm its malicious nature, identifying it as Pdf.Exploit.Agent-36118. The JavaScript is heavily obfuscated but appears to be designed to download and execute a second-stage payload, as indicated by the eval() function and the ML_NYX_PDF_MALICIOUS heuristic.

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` `1d872e2d3b10f294a97679b88863a4465df2790ce037f09758610e12a412a59e`	pdf-javascript-stream	PDF /JS object 13 at offset 0x336	13721 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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