Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 de716a5e98013894…

MALICIOUS

RTF / .DOC

82.8 KB First seen: 2023-06-16
MD5: 10cd284660133c5f8f33cc4cccc0f34f SHA-1: 5baa5806ea5b7eb7da3d7b89910f48922da579b9 SHA-256: de716a5e98013894445471b78da71e1a68739adb4573ec3e4d01c110ee41b957
102 Risk Score

Malware Insights

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

The RTF document contains embedded OLE object data and is configured to automatically update and activate this object. This suggests an attempt to leverage OLE object execution to deliver a secondary payload, likely represented by the extracted 'objdata_00_off00000089.bin' artifact. The specific nature of the payload is not discernible from static analysis alone.

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_off00000089.bin
73abc44f2e9dfcdfff0e6bf95b9230a26d1f4382b74fdd8a5b3d3088f1918f52
rtf-objdata-decoded RTF \objdata at offset 0x89 42296 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact entropy is 7.99, consistent with packed or encrypted content.