Malicious PDF — malware analysis report

Static analysis result for SHA-256 5698eb1c42680d12…

MALICIOUS

PDF

1.2 KB
MD5: 5b1e3bbd8eef2c667b5d8e3bdc9d04d1 SHA-1: 5e2b8e53e99a3eb6852b0bec6d8ca0e267176af1 SHA-256: 5698eb1c42680d12e629aa6d064ff44ee24bf18d52ff404d37d3875d0e68f666
106 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.002 Spearphishing Attachment T1204.002 Malicious File

The PDF file contains embedded JavaScript that is automatically executed upon opening, as indicated by the PDF_OPENACTION_JS_SUBMITFORM heuristic. The document body explicitly instructs the user to open the file in Adobe Acrobat Reader and allow prompts, suggesting a social engineering lure. The embedded JavaScript is designed to submit form data to the URL http://2fa.com-token-auth.com/XcmVOjaXBpZWy50X2lkPTQMyMjA1LeMTA2pMCZjYW1wHYWWlnbl9ydW5faWQ9OTkzDMzI1JmFjdGlvbj1hdHRhY2htZW50#FDF, likely to exfiltrate information or redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF auto-runs JavaScript form submission on open critical PDF_OPENACTION_JS_SUBMITFORM
    PDF uses /OpenAction to run JavaScript that calls submitForm() with an external HTTP(S) URL. Opening the document triggers the outbound submission path without requiring a normal link click.
  • 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.
  • 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://2fa.com-token-auth.com/XcmVOjaXBpZWy50X2lkPTQMyMjA1LeMTA2pMCZjYW1wHYWWlnbl9ydW5faWQ9OTkzDMzI1JmFjdGlvbj1hdHRhY2htZW50#FDF

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0007_000.js
5b6191971b4d7fcef844d98c3c70308c58e80cd528adbb1a4a35b75e81aa1412		 pdf-javascript-stream PDF /JS object 7 at offset 0x30D 149 bytes
javascript_obj0007_001.js
62466d86005cac53c2d2ce4a297bdb73feafaa7d12fa2eb2dd8bf2d60723d4c6		 pdf-javascript-stream PDF /JS object 7 at offset 0x30D 147 bytes

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