Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 4f871cb63f7d19db…

MALICIOUS

RTF / .DOC

12.7 KB First seen: 2022-05-24
MD5: 649e6644e47a744fa9e7c1584f507961 SHA-1: 77df0bfe8c8f0c852c5a895ea24368ad859ad07b SHA-256: 4f871cb63f7d19db4b76feb488bf321aa77931484278acb0ab94347a6d53d485
121 Risk Score

Malware Insights

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

The file is an RTF document containing OLE object data, indicated by the RTF_OBJDATA heuristic. The RTF_OBJUPDATE heuristic suggests that the embedded OLE object is configured to automatically update, which is a common technique for triggering malicious code execution. While no specific document body content or scripts were provided for analysis, the presence of these RTF-specific heuristics strongly suggests an attack pattern focused on exploiting OLE object activation to deliver a payload.

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 2 \objdata section(s) — embedded OLE objects

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off00001de8.bin
33b926922c3e4c30957d8b8fc6beb59d26e7345b9135fd9a69a8c8a297317af1
rtf-objdata-decoded RTF \objdata at offset 0x1DE8 1615 bytes