Waws-prod-blu-289-5f99.eastus.cloudapp.azure.com isn't a real website — it's an internal Microsoft Azure server name that happens to be reachable over the internet. When you visit it, you get a generic Azure 404 error page, and the SSL certificate doesn't match the domain at all. That means your browser would warn you before you could even load the page, and the connection isn't encrypted properly.
For a backend infrastructure hostname, these signals aren't necessarily signs of a scam, but they do mean this address was never meant for public use. There's no content, no business behind it, and no way to identify the operator. If you've encountered this URL somewhere, treat it as a red flag — it may be used for something behind the scenes that you shouldn't trust. Is waws-prod-blu-289-5f99.eastus.cloudapp.azure.com fake? It's not even a functioning site. The safest move is to steer clear entirely.