Malicious RTF — malware analysis report

Static analysis result for SHA-256 27008a18e929ea3a…

MALICIOUS

RTF

8.2 KB First seen: 2019-11-20
MD5: c9c4e42275b858e180f0cdc62cc1d0bd SHA-1: f5074ee16d48bdad0eb64a08e0901ce7f9901f63 SHA-256: 27008a18e929ea3a3260aeb37ee574db6fb1f1b6c86f8991ccf7c3dfc9ba5b1e
180 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The sample is an RTF document containing embedded OLE object data, specifically triggering heuristics related to Equation Editor and OLE activation. ClamAV identifies this as Doc.Exploit.CVE_2017_11882-6934206-0, indicating exploitation of the CVE-2017-11882 vulnerability. This vulnerability allows for arbitrary code execution when the embedded object is activated.

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 4144 bytes
SHA-256: 19f74523abdef2172df085a1753edceb4c763e37333d7f5b0f37ecc101a16066

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