Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1832d0539d65a77…

MALICIOUS

PDF

45.0 KB
MD5: 8fe14260322a3292b80840f73b70226b SHA-1: 2f431801c355e15bf420b57d6d812007188d26f8 SHA-256: b1832d0539d65a7733ff82406e001dec524bd5a26ac538fddce5d5357534a2e8
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. ClamAV detection as 'Pdf.Exploit.Agent-36128' strongly suggests exploitation of a known PDF vulnerability. The embedded JavaScript is likely responsible for downloading and executing a second-stage payload, although its specific actions are not detailed in the provided evidence. 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
5b0883442a5af6fcc2a95b95471576bc18edac8a089546d9fd503bd931907d28		 pdf-javascript-stream PDF /JS object 8 at offset 0x1E7 45305 bytes
legacy_pdfkit_stage_000.js
e79923f350496fe792f46dbcb4e43e78bcbe92e7bb2df9528eac1684f9cae6cd		 deobfuscated-js double percent-decoded annotation JavaScript at offset 0x1E7 33047 bytes

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