Malicious PDF — malware analysis report

Static analysis result for SHA-256 df19cd3e7d3c6d28…

MALICIOUS

PDF

45.0 KB
MD5: 5683ec97219175ae42d5558a90bb98f0 SHA-1: e9caefea16e1a3f930c93b85e43fae155aa6437a SHA-256: df19cd3e7d3c6d28912a77581798312500e0e1ffc402595603402cc74a0e5cd7
84 Risk Score

Malware Insights

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

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 heavily obfuscated and unreadable, the presence of JavaScript points towards an attack pattern involving code execution or redirection. The embedded URLs, though mostly benign or unknown, are included as potential indicators. The exact functionality of the JavaScript is not fully discernible due to obfuscation, but it is likely designed to download and execute a second-stage payload or exploit a vulnerability.

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
4b90a81fdbb5822215992cbf0bf732fe23f9b7cdf4dc25d93e61d662ccafb819		 pdf-javascript-stream PDF /JS object 12 at offset 0xA1CA 3623 bytes

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