Attachment: ICS calendar file with real estate fraud link

type.inbound
and any(attachments,
        (
          .file_type == "ics"
          or .file_extension == "ics"
          or .content_type in ("application/ics", "text/calendar")
        )
        //
        // This rule makes use of a beta feature and is subject to change without notice
        // using the beta feature in custom rules is not suggested until it has been formally released
        //
        and any(beta.file.parse_ics(.).events,
                (
                  any([.summary, .description],
                      regex.icontains(.,
                                      'file attached',
                                      '\brefer\b',
                                      '\brespon(?:d|se)\b',
                                      '\breview\b'
                      )
                  )
                  or any(.links, regex.icontains(.display_text, 'view'))
                )
                and (
                  any([.summary, .description],
                      regex.icontains(., "1099-s", "draw settlement")
                  )
                  or any([.summary, .description],
                         length(.) < 2000
                         and regex.icontains(.,
                                             '(?:attached|buyer/seller|new|preliminary).closing disclosure',
                                             'settlement.(?:&|and.)?(?:report|statement)'
                         )
                  )
                )
        )
)