Removing Injected Pages from Google Search Results

I need help regarding best way to remove injected pages from SERP

Injected?

Just delete those pages from the site, then hit up GSC to submit a removal request.

What is this site built on? Such as Wordpress, Shopify?

Url removal tool in gsc

Remove all urls at once in gsc in removal tool if urls have sub folder after domain / , then put php code in header of 404 page to 410 , japanese seo keyword hack take a lot of time to to disappear from jsc