Malicious PDF — malware analysis report

Static analysis result for SHA-256 230c6d98292048f4…

MALICIOUS

PDF

45.2 KB
MD5: 254452846170edcdd197541368e58fb1 SHA-1: 877c5855cdbd73ca4fff31a073cd5ab4529329d3 SHA-256: 230c6d98292048f4d7d29c4def2952aefec7091cf0edc7dac3640e60a7ec6264
116 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF file was flagged by multiple heuristics, including ML classification and ClamAV, indicating malicious content. The presence of embedded JavaScript, specifically a PDF JavaScript action and an embedded JS stream, suggests an attempt to execute malicious code. While the document body is unreadable, the heuristics and embedded JavaScript point towards an exploit attempt within the PDF reader. The specific JavaScript stream was not fully analyzed due to obfuscation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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
40b0b716057bb9abf938e0bb7cb6804d3571d596d2d7e4c77ec0885830a3f2b0		 pdf-javascript-stream PDF /JS object 12 at offset 0xA1FE 3678 bytes

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