We have a customer who’s site recently got on Google’s Safe Browsing. After we cleared out all the old site files and upload a new temporary site we still got the following page.

Steps to Fix

• Click on “Details” and see what the error is in Google’s Search Console.
  If the site isn’t in your Google Search Console you can add it as a “Property”. We had to use an .HTML file to verify ownership.
• We had to “request review”. We got to it from this page.
  https://support.google.com/webmasters/answer/3258249?hl=en&ref_topic=4596795
• We used the following page as well to report the page a being safe.
  https://safebrowsing.google.com/safebrowsing/report_error/?tpl=mozilla&hl=en-US

Let us know if this helped you.