Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 fcb7b776870f80ea…

MALICIOUS

RTF / .DOC

570.6 KB
MD5: 51e5e69a3706f5b25965e8b9be30f57b SHA-1: 3529b4ac6af4fef13747ab0e07f17640d0278754 SHA-256: fcb7b776870f80ea86ed26f7b561dff7a12d9eb98e61eee83033d1bcaa801400
129 Risk Score

Malware Insights

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

The RTF document contains OLE object data and an \objupdate directive, indicating it attempts to activate embedded objects. This is a common technique for delivering malicious payloads. The heuristic firings suggest the RTF is exploiting a vulnerability to execute code, likely to download and run a second-stage payload. No specific family could be identified.

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_off00000cf6.bin
3322a890d02c434350c2b3a619f22562eb2895c81c370316ac64b295cea76ede
rtf-objdata-decoded RTF \objdata at offset 0xCF6 129091 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact entropy is 7.97, consistent with packed or encrypted content.