Malicious RTF — malware analysis report

Static analysis result for SHA-256 fe3964d8b914adcb…

MALICIOUS

RTF

8.2 KB First seen: 2018-11-13
MD5: 8c8a7fcd9643fefcd9cae15fb52b73ea SHA-1: b3a9bb15c5b2ee7c1fd9fe1ec0405011018705ea SHA-256: fe3964d8b914adcb16db28421170cf5bf18f6c72c2fb83efaf819fb8e59d200a
180 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 the Equation Editor vulnerability (CVE-2017-11882). This indicates the file is designed to exploit this known vulnerability for client-side code execution. No specific malware family could be identified from the available evidence.

Heuristics 4

  • 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
  • \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_off0000003c.bin rtf-objdata-decoded RTF \objdata at offset 0x3C 4145 bytes
SHA-256: 838d814820bea48604343586ea40dad6a7a13ec896efecca5972729b36e308d8

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