Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 b61a378db7cac769…

MALICIOUS

RTF / .DOC

162.3 KB
MD5: 73df0657542a28840d85dcf5dd1d5a39 SHA-1: 433696daf8522cd2e40afb13857ce9fea3781248 SHA-256: b61a378db7cac7698deb72e955288d4be97d401a890fafaee7903664bc90dddc
147 Risk Score

Malware Insights

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

The RTF document contains OLE object data and is configured to automatically update and activate these objects. This suggests an attempt to exploit vulnerabilities associated with OLE object handling to execute embedded code. The extracted artifact 'objdata_00_off00001be5.bin' is likely the payload. Without further script analysis, the exact nature of the payload remains unclear, but the technique strongly indicates a malicious intent to compromise the user's system.

Heuristics 4

  • 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
  • Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off00001be5.bin
94e4e4713fc2cf3cd6e25177467b29bf0c534ca238d6ccdd188c87bee2139ccd
rtf-objdata-decoded RTF \objdata at offset 0x1BE5 63545 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact entropy is 7.94, consistent with packed or encrypted content.