Data theft is very common nowadays because its easy to track people through their Social security numbers and other personal information that's up on the job portal sites. This is mainly one of the problem of many jobseeker some job portals don't have any security portal and all of the data can be dowloaded or copied by those ill minded people.
This is a classic racket theives are doing. Some recruitment agencies also used to do it and sell identities theyve stolen to people who do not have good credentials. Like i have an aunt who applied a work abroad. Formerly, her passport had been stamped as deported illegal immigrant so she cannot come back to the same country shes been. She wanted so much to travel back there to work but the only possibility was to change her name. The agency offered here anothe identity for some thousands of dollar and be able to fly back. And this is what she did. Under some elses name.