diff --git a/detection-rules/spam_image_hidden_element.yml b/detection-rules/spam_image_hidden_element.yml
deleted file mode 100644
index 1e0fd506224..00000000000
--- a/detection-rules/spam_image_hidden_element.yml
+++ /dev/null
@@ -1,16 +0,0 @@
-name: "Spam: Image as content with hidden HTML element"
-description: "This has been observed in the delivery of emails containing account/membership expiration lure themes of popular online services or delivery notifications."
-type: "rule"
-severity: "low"
-source: |
-  false
-attack_types:
-  - "Spam"
-tactics_and_techniques:
-  - "Evasion"
-  - "Image as content"
-detection_methods:
-  - "Content analysis"
-  - "HTML analysis"
-  - "Sender analysis"
-id: "5de8861f-a343-521f-ac8c-b4b91e389a6e"