Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 ceb372bb4b79e14a…

MALICIOUS

RTF / .DOC

79.9 KB
MD5: 9fec8cf2a72c853744f3cacec08d7454 SHA-1: f2a47f0b6932b63b1a0c326cdff71a0519a6bb9f SHA-256: ceb372bb4b79e14af6090665bd36e42e7a38f1e7b13baf964cfc9250222012da
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious File

The file is an RTF document containing embedded OLE objects that are automatically linked and updated. This suggests an attempt to exploit OLE activation vulnerabilities to execute arbitrary code. The presence of ".objdata" and ".objupdate" heuristics strongly indicates this malicious behavior. Without further script analysis or document body content, the exact payload and delivery mechanism remain unclear, hence the confidence level.

Heuristics 3

  • Automatically linked OLE object high RTF_OBJAUTLINK
    RTF contains \objautlink — an automatically linked OLE object surface that can be updated or activated when Word opens the document.
  • \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_off00002092.bin
f79ed0f5847325f5f2a59b5475ec64b7c499b8d2a30fafb6dc33dabfbf661904
rtf-objdata-decoded RTF \objdata at offset 0x2092 4161 bytes