Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfd0f1ce01017bd5…

MALICIOUS

PDF

45.0 KB
MD5: ac23488964fd2dd7430a0b86842c9f79 SHA-1: 9b86e6f487b8f216902575eb4d05123ec04ad963 SHA-256: bfd0f1ce01017bd59ecf9466e8192f958e813cc6ed200bf31555165b94735835
76 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including 'PDF_JAVASCRIPT' and 'PDF_JS'. ClamAV also detected it as 'Pdf.Exploit.Agent-36128'. The presence of large embedded JavaScript streams suggests the file is designed to exploit a vulnerability and execute malicious code, likely downloading and running a second-stage payload.

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
7a0406e8b7c4b0eb360894d10e80086846bb3db017ec8b89a216152183dd0094		 pdf-javascript-stream PDF /JS object 8 at offset 0x1E7 45305 bytes
legacy_pdfkit_stage_000.js
355af82144d479b671a8ad6e4faa263f325d44ae66de033e53e0b2b0b30f2c96		 deobfuscated-js double percent-decoded annotation JavaScript at offset 0x1E7 33047 bytes

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