If the 5.X.X.X IPs are on-net (on the same switched network as your 62.X.X.107 IP), then the network your server is connected to has multiple subnets on it and your hosting provider should have given you a subnet mask and gateway to use with those. In that case, your server will bridge (not route) the packets to your VM; the server will act as a virtual network switch.
If the 5.X.X.X IPs are routed, then your hosting provider has created a static route that delivers those packets via your server's 62.X.X.107 IP and you need your server to route those packets into an internal VM network. The subnet mask of the 5.X.X.X network that is routed to you would have been provided.
Your hosting provider should be providing you support; they should be able to answer whether those IPs are routed or on-net and may be able to give you directions.