The Brazilian playmaker, who has been competing with Brazil in the Olympics in London, was initially heavily linked with a £30m switch to Manchester United.
"I spoke with Lucas last week, when I saw that something was out in the press," Silva told Mundo Deportivo.
"I know they are talking, there are negotiations, and I hope he will sign for PSG. I know that the PSG and Sao Paulo are talking about it. I would be happy if the guy came to us at the end."
Moura has been playing for Sao Paulo since 2005.