← All detection heuristics · Social engineering
high
PDF_RFP_EXTERNAL_ACTION_LURE
What it means
A request-for-proposal CTA uses an external form or document workflow.
Why it fires
Procurement phishing uses plausible supplier invitations; an unrelated sender and destination domain makes the workflow mismatch high confidence.
Other Social engineering heuristics
SE_BOOKING_COMPLAINT_PHISH PDF_FAKE_DOCUMENT_COMPONENT_INSTALLER OOXML_QR_CREDENTIAL_PHISH SE_CALLBACK_SCAM_TEMPLATE PDF_BRAND_ACCOUNT_UPDATE_REDIRECT_LURE PDF_IMAGE_REPEATED_DECOY_REDIRECT_LURE PDF_IMAGE_DOCUMENT_REVIEW_HOST_LURE PDF_LOCALIZED_DOWNLOAD_HOSTING_LURE PDF_MINIMAL_VIEW_DOCUMENT_REDIRECT PDF_NESTED_ENCODED_CROSSHOST_REDIRECT PDF_UTILITY_REFUND_OFFDOMAIN_LURE PDF_SPARSE_MOVED_ARTICLE_DOORWAY