Malicious RTF — malware analysis report

Static analysis result for SHA-256 691d029fdd450174…

MALICIOUS

RTF

437.0 KB First seen: 2020-05-14
MD5: 113b28cf9befa8cd0c2a8d0b4aa9f52f SHA-1: 07ed35c70e672b7760bac3594e459f3c1fd2974a SHA-256: 691d029fdd4501740550cb21ff0720651d67613dc93e20ec00cc7c30a6d8a535
120 Risk Score

Heuristics 3

  • 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.
  • \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

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off000688a9.bin rtf-objdata-decoded RTF \objdata at offset 0x688A9 1899 bytes
SHA-256: 0c956ae834bf3e1c32da3b74237ef12e8f81e9e5f0e56d7a155e55ac72b593b0

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