Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1695448a732c2f5…

MALICIOUS

PDF

141.2 KB
MD5: 4debe3b58bcb76c03983287303b246f7 SHA-1: bfcae476329eec664ddc647414c6de1053774caa SHA-256: a1695448a732c2f5afdf7ce16a5ee67ebc95493d372d50cf8fb9344b9ee5ee71
84 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 JavaScript/JScript

The PDF file exhibits multiple indicators of malicious intent, including obfuscated JavaScript streams and XFA form elements, which are often used to deliver malicious content. The ClamAV heuristic 'Heuristics.PDF.ObfuscatedNameObject' further supports this assessment. While the exact payload is not immediately clear due to obfuscation, the presence of embedded JavaScript strongly suggests an attempt to execute arbitrary code. The embedded URLs, though not definitively malicious, are part of the document's structure and could be used in conjunction with the 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
c4ba3591c3074e8fbc2f51681f2267ae4d6650196a96437268cf3aa864f515e3		 pdf-javascript-stream PDF /JS object 12 at offset 0x228D8 5835 bytes

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