I want to send this warning to new people, it may be a virus application.
It's a virus application. Actually a clone programmed to steal your details. This is why it's very dangerous to save sensitive information on telegram.
Next time a stranger messages you on telegram and starts discussing about freebies or want you to download a software, use the "block user button ". That's its purpose.
And I suggest telegram should give a warning to block users that send links, files during their first time of sending message.