Attachment: Encrypted PDF With Credential Theft Body

type.inbound
and any(attachments,
        .file_type == "pdf"
        and any(file.explode(.),
                any(.scan.exiftool.fields, .key == "Encryption")
                or (
                  .scan.entropy.entropy > 7
                  and any(.scan.strings.strings,
                          strings.icontains(., "/Encrypt")
                  )
                )
        )
)
and any(ml.nlu_classifier(body.current_thread.text).intents,
        .name == "cred_theft" and .confidence in ("medium", "high")
)
and (
  (
    profile.by_sender().prevalence in ("new", "outlier")
    and not profile.by_sender().solicited
  )
  or (
    profile.by_sender().any_messages_malicious_or_spam
    and not profile.by_sender().any_false_positives
  )
)
// 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
)