Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 833747fe3feaca3e…

MALICIOUS

RTF / .DOC

3.4 KB First seen: 2023-03-14
MD5: 93671555d60537ba07df133dda8592a2 SHA-1: 396ab1b853fac12d406bc1687cf18cb0a2cc061e SHA-256: 833747fe3feaca3e71a38cc66ee5003a846fc43a61e8a59e093a23c5b260ef90
60 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The RTF document contains an OLE object with ".objdata" and ".objupdate" directives, indicating an attempt to exploit OLE object activation. This is a common technique for delivering malicious payloads. The high severity heuristic for \objupdate at offset 0x242 strongly suggests an exploit is present.

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_off0000007a.bin
ea2f1e2cc491e179f07c86710ef53aa0ae4ad8d0c1c223b226db1ba1245ce8a2
rtf-objdata-decoded RTF \objdata at offset 0x7A 1632 bytes