Malicious RTF — malware analysis report

Static analysis result for SHA-256 12a83329805c8b4b…

MALICIOUS

RTF

90.8 KB First seen: 2021-03-31
MD5: 5c1a563ea4bf32ddb0dadfe0a60b1376 SHA-1: 2c4241a980a78a26470bc26f32e30b9717b11936 SHA-256: 12a83329805c8b4b1eab8aa4c2f9552ef792fe229a1bdaf11efcebb07ce36f5a
240 Risk Score

Heuristics 6

  • Equation Editor ProgID + OLE object high CVE related RTF_EQUATION_EDITOR
    RTF references Equation.3 ProgID alongside \objdata — likely Equation Editor (CVE-2017-11882 / CVE-2018-0802 / CVE-2018-0798) but without the binary CLSID payload, so flagged at HIGH instead of CRITICAL.
  • ClamAV: Rtf.Exploit.CVE_2018_0802-6624871-1 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Rtf.Exploit.CVE_2018_0802-6624871-1
  • Equation Editor object class critical RTF_OBJCLASS_EQUATION
    Object class 'equation.3' references Equation Editor
  • \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
  • 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_off0000016a.bin rtf-objdata-decoded RTF \objdata at offset 0x16A 26400 bytes
SHA-256: d5972e07abe22d977cf95548c34b9d2a2173a1aada0776176ea7a6eeef3d31fa

Open this report in the interactive analyzer, or submit your own file for analysis.