Malicious RTF — malware analysis report

Static analysis result for SHA-256 bd6baac9a03d9231…

MALICIOUS

RTF

9.2 KB First seen: 2020-02-04
MD5: 22793396ec543d0590b94a1e3aef175e SHA-1: 6386b1e40edfa0c94176cb83e24665c41f8e7438 SHA-256: bd6baac9a03d9231d94efed3ce37b00f220f66f240097c50432520a511ba908a
220 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF file contains embedded OLE object data and specifically triggers heuristics related to Equation Editor exploits, including CVE-2017-11882. This indicates the file is designed to exploit a vulnerability in the Equation Editor component to achieve code execution on the victim's machine. No scripts were extracted, and the document body was truncated, limiting further analysis of the payload.

Heuristics 5

  • Equation Editor CLSID critical CVE likely RTF_EQUATION_EDITOR
    Equation Editor OLE CLSID found inside an OLE object — exploited by CVE-2017-11882 / CVE-2018-0802 / CVE-2018-0798
  • ClamAV: Doc.Exploit.CVE_2017_11882-6934206-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Exploit.CVE_2017_11882-6934206-0
  • 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

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off0000003f.bin rtf-objdata-decoded RTF \objdata at offset 0x3F 4663 bytes
SHA-256: 01192e6ea6af97a658cc372f2267a6dfde61001cbb6a5b7e641beaa502b71c8c

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