Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d846b8060f61c00…

MALICIOUS

PDF

45.0 KB
MD5: c2178416d2415d56cebeceda23f00e69 SHA-1: c3b7ecec3a60574e126ff1c6cfa52c8d66eac017 SHA-256: 3d846b8060f61c006004b7b2e681056d285a9eb0c2fc30e0688fa4b7674a36b0
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'. The ClamAV detection 'Pdf.Exploit.Agent-36128' strongly suggests this is a malicious PDF exploiting a known vulnerability. The embedded JavaScript is likely responsible for downloading and executing 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
280ebadf2d1f714b47375a365a82d7b19c7969a57caf5d8a6fdbd99384d8c1b0		 pdf-javascript-stream PDF /JS object 8 at offset 0x1E7 45305 bytes
legacy_pdfkit_stage_000.js
daf5a763649bc231ccc017d6b1c3461cdac8426156a8147268b191b135dfbfd5		 deobfuscated-js double percent-decoded annotation JavaScript at offset 0x1E7 33047 bytes

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