Malicious RTF — malware analysis report

Static analysis result for SHA-256 cf00f2dac48e2309…

MALICIOUS

RTF

8.3 KB Authoring application: Riched20 6.3.9600 First seen: 2022-06-20
MD5: f4ec2e2435034cd208d1bd71ebfd9d74 SHA-1: c2f01e916c044bcbc1712daaf2a6b41a64ed4be4 SHA-256: cf00f2dac48e230955fa1e2e5c18a7e5fc3efe2969c1f2e233e1aa56b0980bd6
260 Risk Score

Heuristics 6

  • 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
  • ClamAV: Rtf.Exploit.CVE_2018_0802-6624871-1 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Rtf.Exploit.CVE_2018_0802-6624871-1
  • Equation Editor object class critical RTF_OBJCLASS_EQUATION
    Object class 'equation.3' references Equation Editor
  • \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
  • Embedded OLE object medium RTF_OBJEMB
    RTF contains \objemb — embedded OLE object

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off000000fe.bin rtf-objdata-decoded RTF \objdata at offset 0xFE 3754 bytes
SHA-256: 0fd0fec672418087d90cc0aabd878e26fb296eb597a606782e931a06ac3162ff

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