Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 21262bfa0505c909…

MALICIOUS

RTF / .DOC

111.5 KB First seen: 2026-02-12
MD5: 5a795e9e7bd5c2905e5845b9ce2e77d0 SHA-1: f1482ddf7a28558e9897b2b0698ef44a1e76da95 SHA-256: 21262bfa0505c909dd87d3572c10fcbd18212089cd503b6f9bdc4a37a17352dd
60 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment

The RTF document contains embedded OLE object data which is triggered for activation by \objupdate. This suggests an attempt to execute embedded code. While no specific script was extracted, the presence of OLE object data strongly indicates a malicious intent to exploit this mechanism, likely for downloading and executing a secondary payload. The confidence is moderate due to the lack of directly executable script content.

Heuristics 2

  • \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_off00000949.bin
d9cd28528d13bcc4926a60ebacc2e8c08147cacf896f1cf4cd11591f06cdbed0
rtf-objdata-decoded RTF \objdata at offset 0x949 4177 bytes