Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fed9a5eac21cca3…

MALICIOUS

PDF

12.5 KB
MD5: a1a3ba76661296d862663abe3a219274 SHA-1: f086a0796a786b6f83dd4bce91ea8b06f90435af SHA-256: 4fed9a5eac21cca38dc8876961643a162bd3d5219b7dba11a9874e81b689bfd5
166 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: Malicious JavaScript

This PDF file was flagged as malicious by multiple heuristics, including a critical ClamAV detection (Pdf.Exploit.Agent-36365) and an ML classifier. It contains embedded JavaScript, which is a common technique for exploiting PDF vulnerabilities. The embedded JavaScript is likely responsible for executing the malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • ClamAV: Pdf.Exploit.Agent-36365 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-36365
  • 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.

FilenameKindSourceSize
javascript_obj0076_000.js
63cbf8581bd2daa6bd32ccb96cf0f2d0b52458abb82465d05ed16917b44f125b		 pdf-javascript-stream PDF /JS object 76 at offset 0x369 11745 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36364
Obfuscation or payload: unlikely

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