Malicious Office (OOXML) / .XLSX — malware analysis report

Static analysis result for SHA-256 3dd6200864cab020…

MALICIOUS

Office (OOXML) / .XLSX

73.8 KB Created: 2021-03-16 17:54:25 UTC Authoring application: Microsoft Excel 16.0300
MD5: 77232b9050ca66ee9a36a6bd49c7cdbb SHA-1: f062dbd28418a4aa1a946d7d536d5c06cb1c7ee5 SHA-256: 3dd6200864cab020bf6d2b5bfe7483f995d96be8caa1f6256791d2cbf84825e1
68 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment

The OOXML file contains a clickable image designed as a phishing lure, directing the user to an external form. This is supported by the 'OOXML_CLICKABLE_IMAGE_FORM_LURE' heuristic firing. The external URL is identified as the primary IOC. While the form host is marked benign, the overall pattern suggests a credential harvesting attempt.

Heuristics 3

  • OOXML clickable image phishing/form lure critical OOXML_CLICKABLE_IMAGE_FORM_LURE
    Workbook uses a large embedded image as the visible document body and attaches a click-through external hyperlink to that image. The target is a form/collection service or the drawing contains download/view lure text, which is a common credential or document-phishing pattern rather than benign workbook data.
  • External hyperlinks (1) low OOXML_EXTERNAL_HYPERLINKS
    Document contains 1 external hyperlink — clickable URLs are stored as external relationships. First target: https://3nfm0yxgkry.typeform.com/to/tcuAImwc
  • 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 https://3nfm0yxgkry.typeform.com/to/tcuAImwc
    • http://schemas.openxmlformats.org/spreadsheetml/2006/main
    • http://schemas.openxmlformats.org/officeDocument/2006/relationships
    • http://schemas.openxmlformats.org/markup-compatibility/2006
    • http://schemas.microsoft.com/office/spreadsheetml/2009/9/ac
    • http://schemas.microsoft.com/office/spreadsheetml/2014/revision
    • http://schemas.microsoft.com/office/spreadsheetml/2015/revision2
    • http://schemas.microsoft.com/office/spreadsheetml/2016/revision3