Unfamiliar query string in Google Search Console URL not found

It’s not a standar URL for sure. That kind of URLs are most likely due to the compromised code, so there is no need to do anything with then but remove every trace it left.

Since the site is clean now, you should just remove those URLs from the Google Search Console.

  1. Log into the Google Search Console and select the desired website
  2. Click on Google Index in the left-hand navigation
  3. Click on Remove URL in the sub-menu
  4. Click on the button Temporarily Hide on this page

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You will now be asked to type in the URL of the page that you want to be removed and confirm your choice by clicking on continue.

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Done. Now you have to wait some time until the desired URL is removed from Google’s index.