There are lots of Airdrop who are currently running nowadays, but it is very rare to find one who are legit.
There are ways to determine whether a Airdrop is a scam or legit..
These is what i know
I may say it is a scam if there are requiring you to send your Private Keys, by these you really are sure it is a scammed.
They are representing unknown and an unbelievable Tokens, these are just taking all your personal information and use this basic information to scam you.
If they are also requiring you to send any private information such password and keys.