Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f8e761d2e38f0e5…

MALICIOUS

PDF

3.3 KB
MD5: cb4d74480a4fce4d128e81dfc788502b SHA-1: dfe5f379935b9cffbdf7630af212fb51fc0b5e6e SHA-256: 0f8e761d2e38f0e5d9d4535ea7c3958b907bdef6838350c79c96e59e8147bc30
106 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The PDF file contains embedded JavaScript, identified by multiple heuristics and ClamAV detection as malicious. The JavaScript code appears to be obfuscated but is designed to execute a command, likely to download and run a second-stage payload. The ML classifier also strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 3

  • ClamAV: Pdf.Exploit.Agent-36121 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-36121
  • 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_obj0007_000.js
8173e578df169052a02b959e37f41ee1da7fa3edf4dda2c5444123ec8dc0f23c		 pdf-javascript-stream PDF /JS object 7 at offset 0xA80 336 bytes

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