Malicious PDF — malware analysis report

Static analysis result for SHA-256 38e1a4bf95a5f8d5…

MALICIOUS

PDF

45.0 KB
MD5: 8c86844e695c682e255f89baa18fb60a SHA-1: a9d40403cc154562eb9ece01e2dd7ed8dbb22249 SHA-256: 38e1a4bf95a5f8d5579e6d5ba9bf13b9bf7d82e661d5e58fbcb38da2f6be9c88
76 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. ClamAV detection as 'Pdf.Exploit.Agent-36128' strongly suggests it exploits a known PDF vulnerability. The embedded JavaScript is likely responsible for downloading and executing a second-stage payload. The document body content is not indicative of a specific lure.

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
55b2f9d7605efc69f3c964e36c17887508095910be520be7b0e10be77081569b		 pdf-javascript-stream PDF /JS object 8 at offset 0x1E7 45305 bytes
legacy_pdfkit_stage_000.js
2f23c77cbabc646a9d1e57e6dddfce50db29f9a39b6a6491f6a814ffe4ab0918		 deobfuscated-js double percent-decoded annotation JavaScript at offset 0x1E7 33047 bytes

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