Malicious RTF — malware analysis report

Static analysis result for SHA-256 b30837eec650fd67…

MALICIOUS

RTF

76.2 KB First seen: 2024-08-13
MD5: 04f40400495c1c17270f9c71e6d40717 SHA-1: 12adf24ecf47e43c22f9641fdf4cfbaae4f55ced SHA-256: b30837eec650fd6729e076dc3c76c2fe324d1c380557dbdd3ba178daeb211377
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Phishing: Spearphishing Attachment T1204.001 Malicious Link: Malicious Link

The RTF file contains OLE object data and triggers an ".objupdate" command, indicating an attempt to activate embedded objects. The critical heuristic "RTF_EQUATION_EDITOR" specifically points to a known exploit targeting the Equation Editor component. This suggests the file is designed to leverage this vulnerability to execute arbitrary code, likely to download and run a secondary payload.

Heuristics 3

  • Split hex Equation Editor ProgID + OLE object critical RTF_EQUATION_EDITOR
    RTF embeds the Equation.3 ProgID as hex bytes near OLE object activation and splits the byte stream with whitespace or an ignorable RTF group. This is an Equation Editor OLE activation surface commonly used by CVE-2017-11882 / CVE-2018-0802 exploit documents.
  • \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_off00001b5f.bin
1c54fa860676a514421eb51be7bdb7f49a4dfa83e21c99af56784174be13fdd9		 rtf-objdata-decoded RTF \objdata at offset 0x1B5F 1567 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.