Malicious RTF — malware analysis report

Heuristics 7

• Split hex Equation Editor ProgID + OLE object critical CVE likely RTF_EQUATION_EDITOR
  RTF embeds the Equation.3 ProgID as hex bytes near OLE object activation and splits the byte stream with whitespace or an ignorable RTF group. This is an Equation Editor OLE activation surface commonly used by CVE-2017-11882 / CVE-2018-0802 exploit documents.
• Equation Editor activation — CVE-2017-11882 related high CVE related CVE_2017_11882_ACTIVATION_RELATED
  RTF decodes to an Equation.3 ProgID and requests OLE activation with \objemb plus \objupdate. This reaches the legacy Equation Editor attack surface used by CVE-2017-11882/CVE-2018-0802 documents, but the malformed MTEF/native payload needed for stronger attribution was not recovered.
• CVE-2026-21514 — Word/OLE security bypass in RTF high CVE likely CVE_2026_21514
  RTF contains a hidden \svb hex package with DrsE2oDoc and downRevStg drawing compatibility parts. This matches an observed CVE-2026-21514 exploitation shape that manipulates Word's internal document structure and trust decisions.
• \objupdate forces OLE activation high RTF_OBJUPDATE
  RTF contains \objupdate — forces automatic OLE object instantiation when the document is opened, bypassing user interaction. Almost exclusively seen in Equation Editor exploit documents.
• OLE object data medium RTF_OBJDATA
  RTF contains 2 \objdata section(s) — embedded OLE objects
• Embedded OLE object medium RTF_OBJEMB
  RTF contains \objemb — embedded OLE object
• 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://schemas.microsoft.com/office/2006/metadata/properties In RTF body

  • http://www.w3.org/2001/XMLSchema-instanceIn RTF body
  • http://schemas.microsoft.com/office/infopath/2007/PartnerControlsIn RTF body
  • http://schemas.openxmlformats.org/officeDocument/2006/customXmlIn RTF body
  • http://schemas.microsoft.com/office/2006/metadata/contentTypeIn RTF body
  • http://schemas.microsoft.com/office/2006/metadata/properties/metaAttributesIn RTF body
  • http://www.w3.org/2001/XMLSchemaIn RTF body
  • http://schemas.microsoft.com/office/2006/documentManagement/typesIn RTF body
  • http://schemas.openxmlformats.org/package/2006/metadata/core-propertiesIn RTF body
  • http://purl.org/dc/elements/1.1/In RTF body
  • http://purl.org/dc/terms/In RTF body
  • http://schemas.microsoft.com/internal/obdIn RTF body
  • http://dublincore.org/schemas/xmls/qdc/2003/04/02/dc.xsdIn RTF body
  • http://dublincore.org/schemas/xmls/qdc/2003/04/02/dcterms.xsdIn RTF body
  • http://schemas.microsoft.com/sharepoint/v3/contenttype/formsIn RTF body
  • http://schemas.openxmlformats.org/officeDocument/2006/cus�In RTF body

Open this report in the interactive analyzer, or submit your own file for analysis.