Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dec9c8ad31d216a…

MALICIOUS

PDF

12.4 KB
MD5: bb72c1633de5b53d37d63213dcfe36ca SHA-1: 39b7c6015db4f271dd40448c634eaf7b286f4f65 SHA-256: 8dec9c8ad31d216adbb9f62b1a4275cabc0fc71378e58f318030ac3a2d06a8f8
166 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings and the presence of an extracted JavaScript file. ClamAV detections for 'Pdf.Exploit.Agent-36365' and 'Pdf.Exploit.Agent-36364' strongly suggest the JavaScript is used to exploit vulnerabilities within the PDF reader. The ML classifier's high confidence further supports this assessment.

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
8e2534a53f1371b091c90143c9296d767c88fd570c3a28780cd31c436fa411fa		 pdf-javascript-stream PDF /JS object 76 at offset 0x369 11585 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36364
Obfuscation or payload: unlikely

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