Malicious PDF — malware analysis report

Static analysis result for SHA-256 23a9479eaf464718…

MALICIOUS

PDF

45.0 KB
MD5: 1f9751096dfdecaee226f159a8ce764f SHA-1: 3028af23541874ee1df06cc49cf2c52d3149189c SHA-256: 23a9479eaf4647180143f8b667cae4c65b391c66b7975f1a479b1ded5df4311e
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 extracted JS streams. ClamAV detection as 'Pdf.Exploit.Agent-36128' strongly suggests exploitation of a 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
cf2c9833a516e8e88a71587c172180f84a5a9942745030f5e7eaa4ae7b84195b		 pdf-javascript-stream PDF /JS object 8 at offset 0x1E7 45305 bytes
legacy_pdfkit_stage_000.js
f120476d98ad73c4650df179d86dac49b7a58ae2870c4c8d98272f48bb629dd3		 deobfuscated-js double percent-decoded annotation JavaScript at offset 0x1E7 33047 bytes

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