Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f58ee2167e00503…

MALICIOUS

PDF

45.9 KB
MD5: 1539b84a6e332790e15f56b4270b3ec5 SHA-1: fa46d6ba2f75837bfae34eadf9c2fb68113c02ea SHA-256: 1f58ee2167e0050354e22cf691c218d422b33954b37154192b88a2c3066a00f8
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 for 'Heuristics.PDF.ObfuscatedNameObject' further suggests malicious intent. The embedded JavaScript is likely responsible for executing malicious actions, potentially downloading a second-stage payload, although the exact functionality is obscured. The presence of XFA form elements also points to a complex PDF structure often used for obfuscation.

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
02a7eccd20379b71bfb9402ba549ed09262e610c3963ce0beb5bf4e1379ba718		 pdf-javascript-stream PDF /JS object 12 at offset 0xA1F3 4146 bytes

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