Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6c81cac6c849b2f…

MALICIOUS

PDF

45.9 KB
MD5: 252834d37e2b2d6d48dbbc2c40606128 SHA-1: 46096ffba736a1d44d7caa719fd8d460d0ca463a SHA-256: b6c81cac6c849b2f9188756f38a4c9e2410ba8cdc9a11bb5e867af761382d12a
116 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 ML classifier also flagged this PDF as malicious with a high score. While the document body is largely unreadable, the presence of JavaScript suggests an attempt to execute malicious code. The embedded URLs, though some are confirmed benign, are part of the document's structure and could be used in conjunction with the script.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9608

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
db3fb188cb33420846cb6b48d6bfad7153e892360d1a845fef755ca66512b576
pdf-javascript-stream PDF /JS object 12 at offset 0xA1E4 4323 bytes