Malicious PDF — malware analysis report

Static analysis result for SHA-256 765bf9b3325ecab6…

MALICIOUS

PDF

3.3 KB
MD5: 304335f9d7d0e5bb4a20647487c7c8df SHA-1: 8f8abe7796cd9b8f324a7b790b40f69acabf2bf4 SHA-256: 765bf9b3325ecab65a4a384c8c424f7ccb8ef97f93ca049b788121f811666e3b
106 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The file is a PDF containing embedded JavaScript, flagged by multiple heuristics and ClamAV as malicious. The JavaScript code appears to be obfuscated but is designed to extract information from the PDF's title property and execute it. This strongly suggests the script is intended to download and execute a secondary payload, a common technique for PDF-based exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 3

  • ClamAV: Pdf.Exploit.Agent-36121 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-36121
  • 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_obj0007_000.js
225982d5c91fe4a8625dd0f91f110e0ee67054a157a7f12edc3a3a960971fa9e		 pdf-javascript-stream PDF /JS object 7 at offset 0xA86 356 bytes

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