There are disclosed devices, system and methods for feeding identification data of malicious creatives existing in internet advertisements to a supply side platform (SSP) by receiving reports of unwanted actions without user action by malicious creatives of internet advertisements (ads) requested from the SSP by webpages being displayed to users. The reports include a creative identification (ID), a malicious code chain of events, and a demand side platform (DSP) ID or a seat ID. The reports are pre-processed by classifying the unwanted action attempts based on the chain of events. The pre-processed reports are parsed to extract the creative IDs, the SSP IDs and the DSP IDs; and then stored in a searchable database. The stored parsed pre-processed reports are feed to SSPs based on the SSP identifications. The feed includes the creative IDs, the SSP IDs, the DSP IDs, timestamps of the unwanted action attempt and the classifications.