Malicious RTF — malware analysis report

Static analysis result for SHA-256 214f6eabe8f7901a…

MALICIOUS

RTF

338.6 KB Authoring application: Riched20 10.0.17134 First seen: 2021-01-11
MD5: beb885a066a5b44dcd2172f8f1c3e4d2 SHA-1: 96dbee24d1e7b5276fe185d55d8f84a45491d3a5 SHA-256: 214f6eabe8f7901adeaba130f205149c1f240cfa4c608de2f9b42fcb5521c0d1
260 Risk Score

Heuristics 6

  • Composite Moniker in RTF OLE object high CVE related RTF_COMPOSITE_MONIKER_RELATED
    RTF contains Composite Moniker CLSID in OLE object context, but no nearby scriptlet/SCT payload was confirmed. Treat as related moniker attack-surface evidence rather than proof of CVE-2017-8570 exploitation.
  • ClamAV: Xls.Malware.Sload-7135989-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Xls.Malware.Sload-7135989-0
  • \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 5 \objdata section(s) — embedded OLE objects
  • Embedded OLE object medium RTF_OBJEMB
    RTF contains \objemb — embedded OLE object
  • OlePres presentation stream in RTF OLE object medium RTF_OLEPRES_STREAM
    RTF contains an embedded OLE object with an OlePres presentation stream. OlePres is an OLE presentation marker and is not enough on its own to identify CVE-2025-21298.

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off00000113.bin rtf-objdata-decoded RTF \objdata at offset 0x113 33696 bytes
SHA-256: 893cfec6c02ece620d50c3463305fec26a9e99dd5ec16bb31b969c4e87b5e1f9
Detection
ClamAV: Xls.Malware.Sload-7135989-0
Obfuscation or payload: unlikely
objdata_04_off00043bf7.bin rtf-objdata-decoded RTF \objdata at offset 0x43BF7 33696 bytes
SHA-256: 964962e90090faa25e34737f88be73f967d5f326895e32d3441ddcaecff9f463
Detection
ClamAV: Xls.Malware.Sload-7135989-0
Obfuscation or payload: unlikely

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