Malicious RTF — malware analysis report

Static analysis result for SHA-256 7846e94578bfb52f…

MALICIOUS

RTF

7.4 KB First seen: 2021-02-23
MD5: 6db6b12da006a93c9a3959816d8c3905 SHA-1: 728e8e1f0f760686b684ebe2dafad01ae217e47c SHA-256: 7846e94578bfb52f4df958a6c0fb90769c780315988aa60858fe8fd47df4f228
240 Risk Score

Heuristics 5

  • 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.
  • 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_off00000033.bin rtf-objdata-decoded RTF \objdata at offset 0x33 3631 bytes
SHA-256: d5ea719a2063e929ae050e028c3a37f266b71dd61bb934aacef7d4198f042872