Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 71c8c0b87172beb0…

MALICIOUS

RTF / .DOC

447.7 KB
MD5: 546b562e8622be3758f57b7ad57288a8 SHA-1: c1e1f20e28a2b0a80535d40d144b61931cf6ceb8 SHA-256: 71c8c0b87172beb0ebc1bb67c75e43235963a81a85342125256323ecf51cad57
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The RTF document contains OLE object data and triggers automatic linking and updates, indicating an attempt to execute embedded content. The heuristic firings strongly suggest that the embedded OLE object, identified as objdata_00_off00001a6e.bin, is intended to be executed. The document body is unreadable, providing no further context on the lure.

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_off00001a6e.bin
0c2a94523f46e360dbfcd9a98b32318b21806bbff267c45b9d9a9bf8977a2778
rtf-objdata-decoded RTF \objdata at offset 0x1A6E 129079 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact entropy is 7.98, consistent with packed or encrypted content.