Malicious RTF — malware analysis report

Static analysis result for SHA-256 8480ebf8135c905f…

MALICIOUS

RTF

56.4 KB
MD5: 75b4ec52de5013739300aa1fbad15ffb SHA-1: d948262fb36dd79efdcbe6602a4bb560856339fe SHA-256: 8480ebf8135c905fc2af22364edc0c2db404e308c4b2727415162ef50e465d0b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF file contains an embedded OLE object that triggers the CVE-2017-11882 vulnerability in Microsoft Equation Editor. This vulnerability allows for the execution of arbitrary code, likely to download and run a secondary payload. No document body or scripts were extracted, but the critical heuristics strongly indicate exploitation.

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_off0000010e.bin
d1aaac5b3b1a544812ee8003a97730a7e6f9ece8eb4a1d81429f7837cbc39f68		 rtf-objdata-decoded RTF \objdata at offset 0x10E 3631 bytes

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