Malicious RTF — malware analysis report

Static analysis result for SHA-256 c31b4c288414cfec…

MALICIOUS

RTF

80.2 KB
MD5: 00506c5ddd114f48158065948f359a2c SHA-1: 886d5bb28eb18b0b830c3d07f834ac1bf1070177 SHA-256: c31b4c288414cfec8d3e066c8a158c9465870f99ad15b761222bd173b6e70b2a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The sample is an RTF document containing an embedded OLE object that exploits CVE-2017-11882 via a font record overflow in the Equation Editor. This vulnerability allows for arbitrary code execution, indicating a likely exploit delivery mechanism. No specific family could be identified from the available evidence.

Heuristics 4

  • CVE-2017-11882 — Equation Editor FONT record overflow critical CVE likely CVE_2017_11882
    Equation Editor MTEF contains an overlong FONT typeface field, the vulnerable copy primitive for CVE-2017-11882. This is stronger evidence than the Equation Editor CLSID alone because it identifies the malformed record that drives code execution in EQNEDT32.EXE.
  • 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
  • OLE object data medium RTF_OBJDATA
    RTF contains 1 \objdata section(s) — embedded OLE objects
  • Embedded OLE object medium RTF_OBJEMB
    RTF contains \objemb — embedded OLE object

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off000023b8.bin
80c90b02cd38d25e3d29aa0b7aee68d667586a39b9dfc70e3eec058db320c961		 rtf-objdata-decoded RTF \objdata at offset 0x23B8 3631 bytes

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