Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe5a7cf34a74a236…

MALICIOUS

PDF

44.8 KB
MD5: 3fd160be3687d52b5be6eed7da378bd0 SHA-1: 7c0f994af96a84224342575e4a700af9a5bd448f SHA-256: fe5a7cf34a74a2366cc19c75ecbb1dec79785c0d397a467c9ba99b72999cf133
84 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.002 Spearphishing Attachment T1204.002 Malicious File

The file is a PDF containing embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. The ClamAV detection of 'Heuristics.PDF.ObfuscatedNameObject' further suggests malicious intent. While the document body is heavily obfuscated and unreadable, the presence of JavaScript points towards an attempt to execute arbitrary code. The embedded URLs are related to XFA forms, which are known to be exploited in PDF-based attacks.

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
5f5a529d80a71b22d29d78f4cd2522c9d1f9429ad0e9efeff4282f3c73ff9f93		 pdf-javascript-stream PDF /JS object 12 at offset 0xA1E7 3306 bytes

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