Backup

Hi,
yes. There are two ways:

1. Use Akeeba Backup extension and exclude tables from the database that you don't need.
2. Use PHPMyAdmin and export those tables: prefix_spmedia, prefix_sppagebuilder, prefix_sppagebuilder_addons, prefix_sppagebuilder_sections.

The most important are: prefix_sppagebuilder (pages) and prefix_spmedia (location of images)

but remember to copy (backup) also used images from: images/2020 , images/2021

prefix = database prefix (!) in old Joomla it was jos_

Tip from: https://www.joomshaper.com/documentation/sp-page-builder/sp-page-builder-3/how-to-tips#how-to-backup-pages-created-in-sp-page-builder

About malware please read my blog posts:

1. https://www.joomshaper.com/blog/how-can-i-find-out-if-my-joomla-website-is-hacked
2. https://www.joomshaper.com/blog/my-joomla-site-was-hacked-what-to-do

I even have written a whole book about this, but it's not in English language.