Malicious RTF — malware analysis report

Static analysis result for SHA-256 bdebd0318f725200…

MALICIOUS

RTF

53.6 KB Authoring application: Riched20 6.3.9600 First seen: 2021-03-31
MD5: bf8c1a3c204727a944cb1af94ec33fcf SHA-1: ae7e5ca120471a79b3af689f8d75c047b43d7f68 SHA-256: bdebd0318f725200a8dd2da0fdd82f080ddbaff5d5b38dd520b9abb11ca5abdf
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_off000000fe.bin rtf-objdata-decoded RTF \objdata at offset 0xFE 18121 bytes
SHA-256: 07f6892a4e3d9fa967af3364b7f5c211bbcb2fd896abfa189853cb1076e8edf4

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