Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 f51c999a925bb132…

MALICIOUS

RTF / .DOC

8.7 KB
MD5: 66f94e3b09c935f557b281f09edcfc3a SHA-1: e6a7cf5ac036691081317fe72e33f35d800e680d SHA-256: f51c999a925bb1323bc2dde0ed9e0aa8bba039e6b9b9391799699ed969a8844c
260 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1559 Component Object Model Hijacking T1059 Command and Scripting Interpreter

The file is an RTF document containing embedded OLE objects, specifically triggering heuristics related to Equation Editor exploits. The critical ClamAV detection confirms this is Rtf.Exploit.CVE_2017_11882-6584355-1, indicating a known vulnerability exploitation. This pattern suggests the document is designed to lure the user into activating the OLE object, which then leverages the Equation Editor vulnerability to execute arbitrary code.

Heuristics 6

  • Ole10Native stream in RTF OLE object high CVE related RTF_OLE10NATIVE_STREAM
    RTF contains an embedded OLE object with an Ole10Native stream. This is a strong payload-container signal and is related to Word/OLE exploit delivery, but it is not specific enough on its own to assign a CVE.
  • Equation Editor CLSID critical RTF_EQUATION_EDITOR
    Equation Editor OLE CLSID found inside an OLE object — exploited by CVE-2017-11882 / CVE-2018-0802 / CVE-2018-0798
  • ClamAV: Rtf.Exploit.CVE_2017_11882-6584355-1 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Rtf.Exploit.CVE_2017_11882-6584355-1
  • 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 2 \objdata section(s) — embedded OLE objects

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off00000093.bin
5c800970f2d240fea3827980b108f041967d32e650ab4712ce538efe7ec1f478
rtf-objdata-decoded RTF \objdata at offset 0x93 4181 bytes