Malicious PDF — malware analysis report

Static analysis result for SHA-256 908d8c6a494a40cc…

MALICIOUS

PDF

45.0 KB
MD5: 2d8a72b9d3c4c65716dcd7a8d1e41e1a SHA-1: 1ee271496832968d073b96293902156ebbdaceff SHA-256: 908d8c6a494a40cc76a7f23d64cfebda2f5a65fc21769cb2114c0e24cc9d91cf
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 and the presence of JS streams. ClamAV detection as 'Pdf.Exploit.Agent-36128' strongly suggests malicious intent. The embedded JavaScript is likely responsible for exploiting a vulnerability within the PDF reader to execute arbitrary code, potentially downloading 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
bb19bd8fc6ac79e17db82fe1af0dff32ad950e55c7308a90dd7a8e509d5efb03		 pdf-javascript-stream PDF /JS object 8 at offset 0x1E7 45305 bytes
legacy_pdfkit_stage_000.js
dc9a278f3cb4c71691aa90a774693e4494be9151862d66f86d498df05fb91256		 deobfuscated-js double percent-decoded annotation JavaScript at offset 0x1E7 33047 bytes

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