Found unknown, large file in my File Manager

I found a 50mb CSV file in my public_html folder called ‘big.csv’. I did not put it there and I have no idea where it came from. I downloaded it and it has data related to stocks and margins, things that have no meaning to me. Was my account hacked? I’m worried I won’t be able to use 000Webhost for this project if these random, large files will show up on their own.

Has this happened to anyone else?

Probably just delete the file and change your 000webhost password and your FTP password