Malicious PDF — malware analysis report

Static analysis result for SHA-256 240f01fd6679e27a…

MALICIOUS

PDF

45.0 KB
MD5: f0f52c2a96e1ac76447aa2668dc1cf74 SHA-1: a84b648ad769053c4627643afe8e09741845d8fb SHA-256: 240f01fd6679e27a6700620e0d150a08aceac680f10c54048aebf1bac81dfcfb
106 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File

This PDF file was flagged as malicious by ClamAV with the signature Pdf.Exploit.Agent-36128. Static analysis revealed embedded JavaScript, which is a common technique for exploiting PDF vulnerabilities. The ML classifier also strongly indicated maliciousness. The embedded JavaScript is likely responsible for downloading and executing a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 3

  • ClamAV: Pdf.Exploit.Agent-36128 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-36128
  • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0008_000.js
86147eb3b21c99c085b215861980a481107d9116f2f986cb0ffa508b977cc0bd		 pdf-javascript-stream PDF /JS object 8 at offset 0x1E7 45305 bytes
legacy_pdfkit_stage_000.js
0dba1c87d4faa975e862db3dab66052aafa373ec600cd08073127d3947b7ddb2		 deobfuscated-js double percent-decoded annotation JavaScript at offset 0x1E7 33047 bytes

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