Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 4f2797ed745adba5…

MALICIOUS

RTF / .DOC

628.8 KB
MD5: c55dc5bc98a1b8bc51b3bf8997d92be6 SHA-1: 145dc4081f7a7d1a27393fbd99b7f483a30208aa SHA-256: 4f2797ed745adba5acde8cc2a2c9fde78263c6c591049f3300c299f3c4f9b5db
129 Risk Score

Malware Insights

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

The RTF document contains an embedded OLE object, indicated by the RTF_OBJDATA heuristic. The RTF_OBJUPDATE heuristic suggests that this object is designed to be activated, likely triggering code execution. The presence of a suspicious extracted artifact further supports this. Without a document body or script content, the exact payload and delivery mechanism remain unclear, but the core attack pattern involves exploiting OLE object handling.

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_off00000946.bin
ac1d9a2c4db2b65445f4b10f04fb10180f095c4c7b2477734e7a3176e66cc8c9
rtf-objdata-decoded RTF \objdata at offset 0x946 128563 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact entropy is 7.98, consistent with packed or encrypted content.