Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 51cc20e327a7dccf…

MALICIOUS

RTF / .DOC

566.4 KB
MD5: 67f9d2b6e4bd8b9e54309fc713de996a SHA-1: 7fa09dcd9cc415d432bc1c0574548a556f0999ef SHA-256: 51cc20e327a7dccfc47583528b0f655e665dd53e3d645478cbff8aeceffdeed0
147 Risk Score

Malware Insights

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

The RTF document contains OLE object data and is configured to automatically update and activate these objects, indicating an attempt to exploit vulnerabilities. The presence of `RTF_OBJDATA`, `RTF_OBJAUTLINK`, and `RTF_OBJUPDATE` heuristics strongly suggests that the document is designed to embed and execute malicious content. The extracted artifact `objdata_00_off00000571.bin` is likely the payload or a component thereof. The document body is heavily obfuscated and does not provide clear textual lures.

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_off00000571.bin
d9b629c64f390756cac776a0e727d0440d76db1881ade4b372640922c7b39886
rtf-objdata-decoded RTF \objdata at offset 0x571 128567 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact entropy is 7.98, consistent with packed or encrypted content.