How to speed up the de-indexing process

Wetter88

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Hi everyone, I'm here to talk about a problem that happened to a site that I own.
Unfortunately it was attacked by a malware, this malware managed to enter through an outdated theme (I use wordpress).
In a few days, a flood of blank pages were created, and my site went from about 300 pages of content to about 28,000 pages.
I promptly removed the malware, performed several scans and now the site is perfectly clean and up-to-date (update all your plugins and delete outdated themes !!!).
Schermata 2021-09-16 alle 19.08.44.png
The problem now is that my site has about 28000 indexed pages of which about 27700 return a 404 error (these are the pages created by the malware that I removed from my site). Obviously I have lost all my ranking, as google is no longer understanding which niche to position my website on. The only way to regain credibility in google's eyes is to quickly de-index all these blank pages (which return a 404 error). The problem is that this process is very slow, is there anything I can do to speed up this process? In the end, I didn't create anything, I was just hit by malware unfortunately.

This is the web core vitals page:
Schermata 2021-09-16 alle 19.08.52.png
 
can't you remove them through PHP My Admin? I think I've done this with one of my websites many years ago, but I removed subscribers (bots). Had 1000s of them and I recall that I've been able to remove them within minutes. I don't remember how I did it, though :(
 
@Wetter88

have you thought about using google search console, removal option and going with the following option?

"Remove all URLs with this prefix"

don't all of those fake pages have a common prefix that you can use for this option?
 
Anyway those pages are removed, how about redirecting all those pages to your homepage till it gets deindexed in its own. It normally get auto deindex in a month
 
Use google Search console to delete unwanted page. this will help to deindex your page
 
@Wetter88 - one more suggestion: check to see if those dummy pages have been removed from your sitemap, and if yes, resubmit your sitemap to google search console. this should also help.
 
Remove them from database in php my admin or add no index in robots.txt
 
don't all of those fake pages have a common prefix that you can use for this option?
Unfortunately, in most cases no. They (knowingly) coded the script to have a random prefix for every link, so it almost never repeats.

At least that's how it was in my case.
 
@Wetter88 - one more suggestion: check to see if those dummy pages have been removed from your sitemap, and if yes, resubmit your sitemap to google search console. this should also help.
Yeah, they are not in the sitemap.
 
@Wetter88

have you thought about using google search console, removal option and going with the following option?

"Remove all URLs with this prefix"

don't all of those fake pages have a common prefix that you can use for this option?
Unfortunately They have different prefix
 
Use google Search console to delete unwanted page. this will help to deindex your page
I read that it is "temporary", and this removal lasts 6 months, what will happen in 6 months?
 
@Wetter88 sorry this happened to you.

In my experience, the only thing you can do is make sure the server is clean and they're no longer there. After that, be patient and let Google crawler take care of the things.

If any of those links rank and you get clicks, you can remove them (just check yesterday's GSC report) just so you don't get 404 clicks anymore, or at least remove those that get the most clicks.

Other than that, there's no mass removal/deindexing option. I've had a member from here help me with removing links with some script, but it allowed maximum 700-800 a day and it would get blocked for a few days, so not really much of a help.
 
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