Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ea688a3ecfe2510…

MALICIOUS

PDF

45.1 KB
MD5: 83524ab67d94f15cc39d8332bf30c3e5 SHA-1: 165e6c3fe3dec638a8c659cbb68c5398c08f0855 SHA-256: 8ea688a3ecfe25108bac1ada5cb66b20ed73f8e02dbb998874c7ee60e6531a27
76 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. ClamAV detection as Pdf.Exploit.Agent-36128 further confirms its malicious nature. The embedded JavaScript is likely responsible for exploiting a vulnerability within the PDF reader to execute malicious code, potentially downloading 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
fe5a44cfa0996541069154f97dd23aee6219b44afd0e00890517fb018be201a5		 pdf-javascript-stream PDF /JS object 8 at offset 0x1E7 45389 bytes
legacy_pdfkit_stage_000.js
d0bc4a3116cf32dfc02bcef7c2afca89ca86f5adfeb256266d49fd255b110c66		 deobfuscated-js double percent-decoded annotation JavaScript at offset 0x1E7 33107 bytes

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