We don't even have the job posted publicly anywhere and we get >100 submissions per day. Many are duplicates. I've found some that with some minor research turn out to be foreign organized crime. A large number of them had the exact same cover letter with changes in the names and past jobs.
Not only is it difficult to find candidates that actually fit the job role, it's hard to go through any that are even real people.
I've told many friends of mine to use connections and not online job postings because it's basically impossible right now with the automated resume submission companies.
And then the candidate management tools such as lever told me that no, every one of those candidates that applied were real people -- even when I provided proof that at least 40 of them were linked to a single organized crime group out of China.