Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 59afd47e3afbe9f1…

MALICIOUS

RTF / .DOC

159.7 KB
MD5: 951d7b05d023e1f983bd76e2ce23e813 SHA-1: 283682000824e7c9e2112cca1652c23ad49653cb SHA-256: 59afd47e3afbe9f1407e6844a2b8932022f69a1cdac52d3da2d0017632f5ccd0
129 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File Execution: User Execution: Malicious File T1059.001 Command and Scripting Interpreter: PowerShell

The RTF document contains embedded OLE object data, and a heuristic indicates that \objupdate forces OLE activation. This suggests the document is designed to exploit a vulnerability to execute embedded content. The extracted artifact 'objdata_00_off00000c5c.bin' is likely the malicious payload. Without further analysis of the embedded object, the exact family and further IOCs cannot be determined.

Heuristics 3

  • \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_off00000c5c.bin
061ed685f5974ac93bc4869a6411044c7a5c732483695f2e0822f24502e1ce77
rtf-objdata-decoded RTF \objdata at offset 0xC5C 64063 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact entropy is 7.93, consistent with packed or encrypted content.