Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 0951fa32bbdc9a38…

MALICIOUS

RTF / .DOC

1.75 MB First seen: 2023-08-29
MD5: 2e8c9d68f994233c0e3e3da3057bc548 SHA-1: ee4b7e1f7c8d8367f2a4fafe5f4d4d18ba218f85 SHA-256: 0951fa32bbdc9a38141a2229986a2ab82c3a27f29ff047eb1476fe2fd06e67c8
142 Risk Score

Malware Insights

MITRE ATT&CK
T1559.001 Component Object Model and Distributed Component Object Model T1204.002 Malicious File

The RTF document contains OLE object data that is automatically linked and updated, indicating an attempt to execute embedded content. The presence of a large amount of hex-encoded data within an OLE object suggests a hidden payload. The extracted artifact 'objdata_00_off0000008e.bin' is likely the embedded malicious payload.

Heuristics 5

  • 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.
  • Large hex data blocks in OLE object high RTF_EXCESSIVE_HEX
    RTF contains ~1833KB of hex-encoded data inside \objdata sections — may hide a payload
  • 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_off0000008e.bin
6815a1aac27856c267c7cc0fa84a4adec347bf3ebdd49a2220d8956feca8ef56
rtf-objdata-decoded RTF \objdata at offset 0x8E 916879 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact entropy is 8.00, consistent with packed or encrypted content.