Attachment: Legal themed message or PDF with suspicious indicators

type.inbound
// short body or contains emoji
and (
  length(body.current_thread.text) < 1500
  or regex.contains(body.plain.raw,
                    '[\x{1F300}-\x{1F5FF}\x{1F600}-\x{1F64F}\x{1F680}-\x{1F6FF}\x{1F700}-\x{1F77F}\x{1F780}-\x{1F7FF}\x{1F900}-\x{1F9FF}\x{2600}-\x{26FF}\x{2700}-\x{27BF}\x{2300}-\x{23FF}]'
  )
  or regex.contains(subject.base,
                    '[\x{1F300}-\x{1F5FF}\x{1F600}-\x{1F64F}\x{1F680}-\x{1F6FF}\x{1F700}-\x{1F77F}\x{1F780}-\x{1F7FF}\x{1F900}-\x{1F9FF}\x{2600}-\x{26FF}\x{2700}-\x{27BF}\x{2300}-\x{23FF}]'
  )
)

// is not a reply
and length(headers.references) == 0
and headers.in_reply_to is null
and (
  ( // only one attachment
    length(attachments) == 1
    // or, any 2 attachments share the ~same file name
    or any(attachments,
           any(regex.extract(.file_name,
                             // the regex extracts the file name, discarding the file extention and any numbers in parens
                             // "test.txt" and "test (1).pdf" become "test"
                             '(?P<file_name>.*?)(?:\s*\([^)]+\))*\.[^.]+$'
               ),
               length(filter(attachments,
                             strings.istarts_with(.file_name,
                                                  ..named_groups["file_name"]
                             )
                      )
               ) > 1
           )
    )
  )
  // suspicious creator
  and any(attachments,
          (.file_extension == "pdf" or .file_type == "pdf")
          and any(file.explode(.),
                  strings.ilike(.scan.exiftool.producer,
                                "*Google Docs Renderer*",
                                "*Skia/PDF*",
                                "*Neevia Document Converter*"
                  )
          )
  )
)

and (
  // legal language in body with suspicious link in attachment
  (
    any(ml.nlu_classifier(body.current_thread.text).topics,
        .name == "Legal and Compliance" and .confidence in ("medium", "high")
    )
    and any(attachments,
            (.file_extension == "pdf" or .file_type == "pdf")
            and any(file.explode(.),
                    0 < length(.scan.pdf.urls) < 5
                    and (
                      any(.scan.pdf.urls,
                          // with links that are URL shortners
                          .domain.root_domain in $url_shorteners
                          or .domain.domain in $url_shorteners
                          or network.whois(.domain).days_old < 14
                          // when visiting those links, the link it is sus
                          or ml.link_analysis(.).effective_url.domain.tld in $suspicious_tlds
                          or ml.link_analysis(.).credphish.contains_captcha
                          or ml.link_analysis(.).credphish.disposition == "phishing"
                          or strings.icontains(ml.link_analysis(.).final_dom.display_text,
                                               "I'm Human"
                          )
                      )
                    )
            )
    )
  )
  // no body text, legal language in attachment
  or (
    length(body.current_thread.text) < 50
    and any(attachments,
            (.file_extension == "pdf" or .file_type == "pdf")
            and any(file.explode(.),
                    (
                      length(ml.nlu_classifier(.scan.ocr.raw).topics) == 1
                      and any(ml.nlu_classifier(.scan.ocr.raw).topics,
                              .name == "Legal and Compliance"
                              and .confidence in ("medium", "high")
                      )
                      and not any(ml.nlu_classifier(.scan.ocr.raw).entities,
                              .name == "sender"
                              and .text =~ sender.display_name
                      )
                    )
                    // foreign language indicators
                    or regex.icontains(.scan.ocr.raw,
                                       'pornograph(y|ie)',
                                       'interpol',
                                       'europol',
                                       'dissuade',
                                       // French indicators, seen in threatening language
                                       'ce jeu en ligne',
                                       'vraie vie'
                    )
            )
    )
  )
)