Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce85a42b0bdd725a…

MALICIOUS

PDF

45.5 KB
MD5: 2b8a149ddfae3490e07d5e0d19fa3697 SHA-1: 0190f75bfa84555fd258f913d76396bb6bbe235e SHA-256: ce85a42b0bdd725a96d3a57e8f3479dcd35225725dd5ab7e1e2c4d5080b71c3d
84 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 JavaScript/JScript T1559.001 Component Object Model

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 to an attempt to execute code. The embedded URLs are related to XFA forms, which are known to be exploited in PDF-based attacks. The exact payload or purpose of the JavaScript could not be determined due to 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
eb62f656d66b03eb105a234c6693e9622aa804a59e1848e2f56c4a943843f86f		 pdf-javascript-stream PDF /JS object 12 at offset 0xA1D3 3919 bytes

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