I recently got an error from the Magento Security Scan that says
The malicious code signature(s) has been found on the page.
However, there are no pages listed for where the malicious code signature(s) have been found. How can I find out which pages have this problem? My site is running Magento 2.2.3
I understand your problem - but its looks like it is known issue and someone also had post the same issue on the forum here is the link to resolved this - https://community.magento.com/t5/Magento-2-x-Technical-Issues/Your-site-is-compromised-with-injected...
@msavich - will surely help you on this !
If the issue is still reproducible - please write the email to firstname.lastname@example.org and provide your store's URL in the description.