Malicious PDF — malware analysis report

Static analysis result for SHA-256 98a4f7be88174f1b…

MALICIOUS

PDF

45.9 KB
MD5: 24af90b9161a779265832f8b48e7f1e2 SHA-1: 97595654a2c3312d040e84cb6ff1578c0577f1e4 SHA-256: 98a4f7be88174f1b80089aa27e4e511d262931766a6b2791680c8c65fb80fcdd
84 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript, identified by the PDF_JAVASCRIPT and PDF_JS heuristics. The ClamAV detection for 'Heuristics.PDF.ObfuscatedNameObject' further suggests malicious intent. The embedded JavaScript file, 'javascript_obj0012_000.js', is likely responsible for downloading and executing a second-stage payload, a common technique for malware delivery. The XFA form structure (PDF_XFA) may be used to facilitate the execution of this script.

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
64c24f7cf1de1edef993623003ac483b2c8b8df4513660a79162ac92176a94ae		 pdf-javascript-stream PDF /JS object 12 at offset 0xA1FC 4290 bytes

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