Malicious RTF — malware analysis report

Heuristics 5

• Equation Editor CLSID critical CVE likely RTF_EQUATION_EDITOR
  Equation Editor OLE CLSID found inside an OLE object — exploited by CVE-2017-11882 / CVE-2018-0802 / CVE-2018-0798
• CVE-2017-11882 — Equation Editor FONT record overflow critical CVE likely CVE_2017_11882
  Equation Editor MTEF contains an overlong FONT typeface field, the vulnerable copy primitive for CVE-2017-11882. This is stronger evidence than the Equation Editor CLSID alone because it identifies the malformed record that drives code execution in EQNEDT32.EXE.
• Automatically linked OLE object high RTF_OBJAUTLINK
  RTF contains \objautlink — an automatically linked OLE object surface that can be updated or activated when Word opens the document.
• \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 1 \objdata section(s) — embedded OLE objects

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