Malicious PDF — malware analysis report

Static analysis result for SHA-256 43fb4921bf333e3b…

MALICIOUS

PDF

45.2 KB
MD5: cdd822f97a35812d6ab6fd96906bb387 SHA-1: 480b7728a8298649c1d2e7f18182ff1832712752 SHA-256: 43fb4921bf333e3b63d0f783b13f7da58be8d053e50b9ee7113739e23c4d2efd
84 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'. The 'CLAMAV_DETECTION' heuristic further flags it as malicious. While the document body is heavily obfuscated and unreadable, the presence of JavaScript strongly suggests an attempt to execute malicious code. The embedded URLs are related to XFA forms, which are often targeted for exploitation. The exact behavior of the JavaScript could not be determined due to its obfuscation, leading to a moderate confidence score.

Heuristics 5

  • ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
  • 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.
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://ns.adobe.com/xdp/
    • http://www.xfa.org/schema/xci/2.6/
    • http://www.xfa.org/schema/xfa-template/2.6/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0012_000.js
4c3225b3c54e0d5daf9a3c88d8f721d9ca76029e192b377f7f20d1731c8a7456
pdf-javascript-stream PDF /JS object 12 at offset 0xA1F4 3577 bytes