Malicious PDF — malware analysis report

Static analysis result for SHA-256 35bf1fae8afa83b9…

MALICIOUS

PDF

45.0 KB
MD5: 8cb1096271b5fbdc868feac54d4bf194 SHA-1: b39987e857429404ab9338b88c0bfcf8393aef4e SHA-256: 35bf1fae8afa83b9bfe52e7fd414898ca3b60ccd571fa00559b2e3113cb3617c
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'. 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 further malicious code, although the specific exploit mechanism is not detailed in the provided heuristics.

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
910ac8c4b6669e8e73efda107a9b03a02df77452511e83f765dc1d11f73266b6		 pdf-javascript-stream PDF /JS object 8 at offset 0x1E7 45305 bytes
legacy_pdfkit_stage_000.js
39fd2bcc2120fe59ab105c8b2cc21d13cf84b4cd3449a478ec3cb089918fd71c		 deobfuscated-js double percent-decoded annotation JavaScript at offset 0x1E7 33047 bytes

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