Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f76522c24b506fe…

MALICIOUS

PDF

3.3 KB
MD5: 082165ffefac97c4d23ce2cd597b90a5 SHA-1: 6f2b9603b9c5cf5fcf50459dee549170c9a8c4f8 SHA-256: 5f76522c24b506feac910413bf0f0e7b35b097d207e2fa1ac5e40f02113affb8
106 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript, identified by heuristic firings and ClamAV detection as Pdf.Exploit.Agent-36121. The JavaScript code appears to be obfuscated but is designed to execute a command. This execution is likely intended to download and run a second-stage payload, a common technique for malware delivery.

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
13bf2988e02d82b73e39b5bf5e31d293de64da287433ad58f7b633edccce86f1		 pdf-javascript-stream PDF /JS object 7 at offset 0xA81 353 bytes

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