PDF malware analysis — malicious · 9fb473c241df26aa

MALICIOUS

PDF

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

MD5: 305577a3f812d831658dd41f9845cf96 SHA-1: b9df970c2b4c12c0057d3eb5854ed4af975ec49a SHA-256: 9fb473c241df26aa204fbc41f7d651e8953d2ec57d976ae4cc0d3d4f82ab3ed9

208 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript that utilizes eval() calls, indicating an attempt to execute obfuscated code. Heuristics and ClamAV detection strongly suggest this is a malicious PDF exploiting a known vulnerability (Pdf.Exploit.Agent-36118). The extracted JavaScript artifacts, though obfuscated, are indicative of a downloader or exploit loader, likely aiming to fetch and execute further malicious content.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 6

ClamAV: Pdf.Exploit.Agent-36118 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36118
ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV

ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0013_000.js` `71527657a0cf9c443468402645724a942580a3ec435e062fb001e0cb1041defa`	pdf-javascript-stream	PDF /JS object 13 at offset 0x336	13398 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 2 long base64-like blob(s).
`javascript_obj0013_001.js` `5f641d40e164b614d8971a67f28a320a0c5aa0f1bed8851dbecc5d12dacb1abc`	pdf-javascript-stream	PDF /JS object 13 at offset 0x359	14104 bytes
Detection ClamAV: Pdf.Exploit.Agent-36118 Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 2 long base64-like blob(s).

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