Attachment: Microsoft impersonation via PDF with link and suspicious language

type.inbound
and (
  any(attachments,
      (.file_extension == "pdf" or .file_type == "pdf")
      and any(ml.logo_detect(.).brands, strings.starts_with(.name, "Microsoft"))
  )
)
and any(attachments,
        (.file_extension == "pdf" or .file_type == "pdf")
        and any(file.explode(.),
                (
                  length(filter([
                                  "password",
                                  "unread messages",
                                  "Shared Documents",
                                  "expiration",
                                  "expire",
                                  "expiring",
                                  "kindly",
                                  "renew",
                                  "review",
                                  "emails failed",
                                  "kicked out",
                                  "prevented",
                                  "storage",
                                  "required now",
                                  "cache",
                                  "qr code",
                                  "security update",
                                  "invoice",
                                  "retrieve",
                                  'engine failed',
                                  'OneDrive Error',
                                  'problem connecting',                                  
                                  'secure file',
                                  'access'
                                ],
                                strings.icontains(..scan.ocr.raw, .)
                         )
                  ) >= 2
                  or any(ml.nlu_classifier(.scan.ocr.raw).intents,
                         .name == "cred_theft" and .confidence == "high"
                  )
                )
                and (length(.scan.url.urls) > 0 or length(.scan.pdf.urls) > 0)
        )
)
and (
  not any(headers.hops,
          .authentication_results.compauth.verdict is not null
          and .authentication_results.compauth.verdict == "pass"
          and sender.email.domain.domain in (
            "microsoft.com",
            "sharepointonline.com"
          )
  )
)
// negate highly trusted sender domains unless they fail DMARC authentication
and (
  (
    sender.email.domain.root_domain in $high_trust_sender_root_domains
    and not headers.auth_summary.dmarc.pass
  )
  or sender.email.domain.root_domain not in $high_trust_sender_root_domains
)