Malicious RTF — malware analysis report

Static analysis result for SHA-256 5c3d12b29a1bb9fb…

MALICIOUS

RTF

12.1 KB First seen: 2021-04-10
MD5: f885ae8d06eaae37527bf1e334e2426f SHA-1: 75be4c021c16d0e026a9f5291c40aa392f87e9bb SHA-256: 5c3d12b29a1bb9fb775bb6d862a32ae8e89af943b6337c71fe2268dee70055e9
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_off00001c2d.bin rtf-objdata-decoded RTF \objdata at offset 0x1C2D 1881 bytes
SHA-256: a17dec75a92a51b7019b1d2d56c54e967871ab3d8243ae288ff326456d1a462e

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