Malicious RTF — malware analysis report

Static analysis result for SHA-256 b61651ef12b91e29…

MALICIOUS

RTF

405.7 KB First seen: 2022-12-07
MD5: f26895359b7bcb14794822fbbd05a2f9 SHA-1: 20c3cf3dd02297954f7bb025132f7ae13b53e7fa SHA-256: b61651ef12b91e29d6881885d3e6433505a028b198d01b6b59a54c5e6f77c53d
60 Risk Score

Malware Insights

MITRE ATT&CK
T1204 User Execution T1204.002 Malicious File T1059 Command and Scripting Interpreter T1059.001 PowerShell T1566 Phishing T1566.001 Spearphishing Attachment

The RTF file contains OLE object data and an \objupdate directive, indicating it is designed to trigger OLE activation. This mechanism is commonly used to embed and execute malicious code, often to download and run a second-stage payload. No document body text or scripts were extracted, limiting further analysis of the specific lure or payload.

Heuristics 2

  • \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

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off00000917.bin
78c3f370a3597b19f8c7c988c659f7bd6bdc84e4a2a25f6fe60bacfd67dacdc2		 rtf-objdata-decoded RTF \objdata at offset 0x917 1902 bytes

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