Malicious PDF — malware analysis report

Static analysis result for SHA-256 27fcdbf2e4bbbd59…

MALICIOUS

PDF

44.8 KB
MD5: a64023d7557b356dfdd33d421577618b SHA-1: 21f5c94e014bcc7df641bb19424bcf9a3c02792a SHA-256: 27fcdbf2e4bbbd59360424a75da11f9b8b41d8b0c3413668e135af3c370b7905
84 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including 'PDF_JAVASCRIPT' and 'PDF_JS'. The ClamAV detection 'Heuristics.PDF.ObfuscatedNameObject' further suggests malicious intent. While the document body is unreadable, the presence of obfuscated JavaScript strongly implies an attempt to execute malicious code, likely for downloading further payloads or exploiting vulnerabilities. The embedded URLs, though some are marked benign, are part of the XFA form structure which can be leveraged for malicious purposes.

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
b77b189593f78ad1794dc1b436aa388eaecbaa409a7fa4142514b189b1eeae9c		 pdf-javascript-stream PDF /JS object 12 at offset 0xA1ED 3276 bytes

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