Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 7cf91d9ab60d9c5c…

MALICIOUS

RTF / .DOC

110.2 KB First seen: 2026-02-12
MD5: 79ffd3fdc0302fd23c7536967a1d2bb2 SHA-1: af11bab63b1d1da8b49255d0baf5353d0c3de9c8 SHA-256: 7cf91d9ab60d9c5caed19d3b54753fde579dc91941ecbc26a86f94a1c1733130
100 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The RTF document contains OLE object data that is configured to automatically update and activate upon opening. This mechanism is indicative of an attempt to exploit vulnerabilities or execute embedded code, likely to download and run a secondary payload. The high heuristic scores for RTF_OBJDATA and RTF_OBJUPDATE strongly support this attack pattern.

Heuristics 3

  • Ole10Native stream in RTF OLE object high CVE related RTF_OLE10NATIVE_STREAM
    RTF contains an embedded OLE object with an Ole10Native stream. This is a strong payload-container signal and is related to Word/OLE exploit delivery, but it is not specific enough on its own to assign a CVE.
  • \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_off00001023.bin
02e7722b66cf3d1bb89bc4b3b66cfd98d2c73ac4b17c89ddd0683e66fca956d4
rtf-objdata-decoded RTF \objdata at offset 0x1023 4162 bytes