Malicious RTF — malware analysis report

Static analysis result for SHA-256 5a68658e540383c6…

MALICIOUS

RTF

113.1 KB First seen: 2021-02-19
MD5: 071999501a562422116c37ae992f95a7 SHA-1: 1b174ca64f061122519c659a673bdaa7fbe54b99 SHA-256: 5a68658e540383c68c4ce04333394c5da7fb9b88c7c240e14071d4af27a71caa
180 Risk Score

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
  • 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.
  • \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_off0000008e.bin rtf-objdata-decoded RTF \objdata at offset 0x8E 33313 bytes
SHA-256: 55fc1a028cd9323223dbc9ef3a5d4906fd90fd342e12da06fc07f390904dd6e6

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