Malicious PDF — malware analysis report

Static analysis result for SHA-256 04bfed45afc31503…

MALICIOUS

PDF

886.0 KB
MD5: cc5385d896a367cadf9b5120debcb854 SHA-1: 5ddb92305edfc9fab8e2120d892b726c0b122ae9 SHA-256: 04bfed45afc3150378495a850306b3bcd5bd416981110f4570b296de7034044a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF file contains embedded JavaScript and a RichMedia (Flash) object, strongly indicating an attempt to exploit vulnerabilities for client execution. The presence of an embedded SWF file named 'Tatsumaki.swf' further supports this. While the document body is heavily corrupted, the heuristics point towards a malicious PDF exploiting known weaknesses.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 6

  • PDF JavaScript exploit cluster critical PDF_JS_EXPLOIT_CLUSTER
    PDF combines an executable JavaScript/action surface with exploit staging indicators such as eval/unescape/fromCharCode, XFA script content, or a related CVE pattern. Benign form JavaScript remains low-severity, but this correlated cluster is high-confidence malicious behavior.
  • RichMedia (Flash) high PDF_RICHMEDIA
    PDF contains /RichMedia (Adobe Flash) which is a historic exploit vector
  • 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 file low PDF_EMBEDDED
    PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
  • 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/
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdfx/1.3/
    • http://ns.adobe.com/xfa/promoted-desc/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
Tatsumaki.swf
eab502fa6765c2cee53133bc796904659b16f97e0df2b659cf09327322aaa530		 pdf-embedded-file PDF EmbeddedFile object 18 at offset 0xDC67E 4058 bytes

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