Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f72fe4391ae6f6c…

MALICIOUS

PDF

45.5 KB
MD5: 7ced742210345e4825230b3966daae41 SHA-1: 1ed46dd70a44f64d0fc8c9219e8aaf37a87c786e SHA-256: 9f72fe4391ae6f6cab997b2008729651caa28215667235b0e45c69a1325e49ba
84 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF file exhibits multiple heuristic firings related to JavaScript and XFA forms, indicating a high likelihood of malicious intent. The ClamAV detection of 'Heuristics.PDF.ObfuscatedNameObject' further supports this. While the document body is unreadable, the presence of embedded JavaScript suggests it is designed to execute malicious code, potentially downloading further stages or exploiting vulnerabilities. The specific JavaScript stream (javascript_obj0012_000.js) was too large and obfuscated to analyze its precise function, leading to a slightly reduced confidence.

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
b1c6ea5f1bdbeb99e757c38873b1ad036db8cde52aa12fe8ac3c9b52b49ebb59		 pdf-javascript-stream PDF /JS object 12 at offset 0xA1DC 4001 bytes

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