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

Static analysis result for SHA-256 725ded50e7f517ad…

MALICIOUS

Office (OOXML) / .DOC

171.6 KB Created: 2025-05-06 06:31:00 UTC Authoring application: Microsoft Office Word 15.0000
MD5: 964befd24e41a128e9fffdc7b41399a8 SHA-1: 656fa08c341a8d7b74f28a24e1efbcc4b715a886 SHA-256: 725ded50e7f517addd12f029aeaf9a23f2b9ce6239b98820c8a12ea5cb79dbfa
162 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The sample is a malicious OOXML document that leverages two critical vulnerabilities, CVE-2017-8759 and CVE-2023-36884. It attempts to load an external OLE object from the URL https://www-cbsl-gov-lk.dwnlld.com/6b80a15d/Accept_EULA.rtf. This external object is likely a second-stage payload designed to further compromise the victim's system.

Heuristics 5

  • CVE-2023-36884 — external RTF auto-load relationship critical CVE likely CVE_2023_36884
    Document auto-load relationship references a remote RTF file (https://www-cbsl-gov-lk.dwnlld.com/6b80a15d/Accept_EULA.rtf), matching the stronger Storm-0978/RomCom external-RTF delivery shape. Plain clickable hyperlinks are not enough for this CVE rule.
  • OOXML OLE2Link remote document — CVE-2017-8759 related high CVE related CVE_2017_8759_RELATED
    Document contains an o:OLEObject Type=Link whose external oleObject relationship fetches a remote Office-looking document. That is the OOXML OLE2Link staging shape used by CVE-2017-8759 campaigns when the remote document/WSDL supplies the SOAP moniker payload; the local file alone does not contain the WSDL body needed for an exact match.
  • External OLE object relationship high OOXML_EXTERNAL_OLE_OBJECT
    Document contains an oleObject relationship whose target is an external HTTP(S) URL. Office resolves this through OLE/object update paths rather than as a normal user-clicked hyperlink.
  • External relationship medium OOXML_EXTERNAL_REL
    External target in word/_rels\document.xml.rels: media/Kratos.jpg
  • 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://www-cbsl-gov-lk.dwnlld.com/6b80a15d/Accept_EULA.rtf
    • http://schemas.microsoft.com/office/word/2010/wordprocessingCanvas
    • http://schemas.openxmlformats.org/markup-compatibility/2006
    • http://schemas.openxmlformats.org/officeDocument/2006/relationships
    • http://schemas.openxmlformats.org/officeDocument/2006/math
    • http://schemas.microsoft.com/office/word/2010/wordprocessingDrawing
    • http://schemas.openxmlformats.org/drawingml/2006/wordprocessingDrawing
    • http://schemas.openxmlformats.org/wordprocessingml/2006/main
    • http://schemas.microsoft.com/office/word/2010/wordml
    • http://schemas.microsoft.com/office/word/2012/wordml
    • http://schemas.microsoft.com/office/word/2010/wordprocessingGroup
    • http://schemas.microsoft.com/office/word/2010/wordprocessingInk
    • http://schemas.microsoft.com/office/word/2006/wordml
    • http://schemas.microsoft.com/office/word/2010/wordprocessingShape
    • http://schemas.microsoft.com/office/drawing/2014/chartex
    • http://schemas.microsoft.com/office/word/2015/wordml/symex
    • http://schemas.openxmlformats.org/officedocument/2006/relationships/oleobject

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