@OP, you've done well by sharing this with the forum.
It seems there are endless and countless numbers of techniques to perform this same phishing scams, and virtual number generation is literally the latest I'm hearing of. Scammers are getting smarter... They are upgrading their techniques so as to meet up with people's awareness and catch new prey. I have personally received so many phishing mails and few SMS. It's sickening though, but we just have to remaining vigilant.

I wonder why people even use virtual numbers from random websites. Is that not a vulnerability on its own?.

Thanks for sharing the info OP.