Malicious RTF — malware analysis report

Static analysis result for SHA-256 dcf8b9c2451d039b…

MALICIOUS

RTF

210.9 KB
MD5: 96fba31b74c91844a25dfe86fcde6a4b SHA-1: 2b288a555fe8c6d7c34557b148e20c024a4851ab SHA-256: dcf8b9c2451d039b34f04d1ed20cace0e84996b9b48d9fe8e575b9b085f5593d
140 Risk Score

Malware Insights

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

The file is an RTF document containing embedded OLE objects, as indicated by the RTF_OBJDATA and RTF_OBJEMB heuristics. The RTF_OBJUPDATE heuristic suggests that the embedded object is designed to be activated automatically upon opening the document. ClamAV detection confirms this as Rtf.Dropper.Agent-7652590-0, strongly indicating its function as a dropper. The lack of document body text or script content means the exact payload and delivery mechanism cannot be determined, but the RTF structure points to a malicious OLE object execution.

Heuristics 4

  • ClamAV: Rtf.Dropper.Agent-7652590-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Rtf.Dropper.Agent-7652590-0
  • \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
  • Embedded OLE object medium RTF_OBJEMB
    RTF contains \objemb — embedded OLE object

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off000015fa.bin
193c356a426024b4ffa8326945f9a7306b0c2318c7b409c9b67d1952e66e5b26		 rtf-objdata-decoded RTF \objdata at offset 0x15FA 63487 bytes

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