Malicious PDF — malware analysis report

Static analysis result for SHA-256 da54ce9239d0dd6e…

MALICIOUS

PDF

6.6 KB Authoring application: Tisilarehaue (via 1ed92Tibedegabala)
MD5: 181f03fb614883ad7957931493bac834 SHA-1: c535b6ce38dd22d78c5b4e5eff1af9f17e9386b8 SHA-256: da54ce9239d0dd6e37d22448eead5f8596c57773fd554e3fad1667bfbf510f7b
76 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript, indicated by heuristic firings for PDF_JAVASCRIPT and PDF_JS. ClamAV also detected this file as Pdf.Exploit.Agent-36142, confirming its malicious nature. The embedded JavaScript is likely responsible for exploiting a vulnerability within the PDF reader to execute arbitrary code. Due to the obfuscated nature of the JavaScript and the lack of specific IOCs, the exact payload and delivery mechanism remain unclear, but the intent is to exploit the user's PDF viewer.

Heuristics 3

  • ClamAV: Pdf.Exploit.Agent-36142 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-36142
  • 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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0010_000.js
d4dce4f95f7146e3b127d68edf45ceb045483a205d9e9a2a53d6e6b80d83b663		 pdf-javascript-stream PDF /JS object 10 at offset 0x1230 1728 bytes

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