Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 f2d3d7a956a523a2…

MALICIOUS

RTF / .DOC

163.6 KB
MD5: 5790aae1b2ecf56f8a8d27f7d5281190 SHA-1: 73b145cf0f6b96d0f915bdb17d2c3c1bff84d125 SHA-256: f2d3d7a956a523a2294f80c828a51a91bf7115116cef4dbb05335081a9e9e4c4
129 Risk Score

Malware Insights

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

The RTF file contains OLE object data and an \objupdate command, indicating an attempt to exploit OLE activation. The heuristic firings strongly suggest that this mechanism is used to embed and execute an external artifact, likely a secondary payload. The truncated document body prevents a more specific determination of the lure, but the technical indicators point to a malicious OLE object execution.

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_off00001c0b.bin
a7b3ad1d9bd1446f4fc99cf8ee0207bba3d00a92f1126c94c5a61173a9965623
rtf-objdata-decoded RTF \objdata at offset 0x1C0B 64053 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact entropy is 7.93, consistent with packed or encrypted content.