PDF malware analysis — malicious · 9ffd4d41a8ec6d47

MALICIOUS

PDF

12.3 KB

MD5: a6ef83d88d57b9efbe2ecd34f47e9a77 SHA-1: 191630e572f88efc329f16063cf80266734e8466 SHA-256: 9ffd4d41a8ec6d47bd53cfee48c548aebcd3d9258ea6a33dca2b64b6014e2a01

166 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: User Execution

The PDF file was flagged as malicious by multiple engines, including a high-confidence ML classifier and ClamAV, which identified it as a dropper. Embedded JavaScript, detected via heuristics, is the primary mechanism for executing the malicious payload. The ClamAV detection on an extracted artifact suggests the PDF exploits a vulnerability to drop or execute another malicious file.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

ClamAV: Pdf.Dropper.Agent-7287983-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7287983-0
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.
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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0076_000.js` `ba0f350a629476b0aa530f9658c2f223737469344ca558277a1b0f87063b953b`	pdf-javascript-stream	PDF /JS object 76 at offset 0x369	11448 bytes
Detection ClamAV: Pdf.Exploit.Pdfka-9 Obfuscation or payload: unlikely

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