Malware link index by google

Dear Sir

My Niche site attacked by malware on 1 st march 2018. Hacker inject a php file on my blogpage.

Injected link like: mydomain.com/blog/dmy4xa.php?

Then I scan My site by wordfence. Identifying all malware code.Then manually clean whole site with database. My site is completely free from malware. and remove all malware link from webmaster tools. Even Block my blog page by robots.txt .

But new malware link index every week. So i need to remove those link every week. So this issue I decided to rebuild my site.

Finally I rebuild my site another server. Then I flash my current server and migrate my site from those server on 10th january 2019 .

I wait 1 month to deindex malware link. But new link are indexing every week.
Now I have done following:

1. I discourage site from search engine on 24 February.
2. Delete site from google webmaster tools with all properties as well as verification file from server.
3. Block sitemap_index.xml by robots.txt

Today i checked indexing by site:domain.com . I see that 2 malware link are indexed. One old and another new.check from image.

My site is https://mysite.com. and malware link indexed with mysite.com/blog/dmy4xa.php?smhj=kuta-software-infini

malware is without sll.

Please give me a perfect solution.