There is zero chance that this is true, it is obviously a contract ploy. All these reports mentioning PSG being willing to offer a big contract is clearly so that he can point to it and say - look what I can get on the market.
Rashford is a problem player - not so much because of his poor form, which I believe he can get through, but his poor attitude when things aren't going well is an issue. In fact, I can't think of an academy graduate that became a first team regular for us in the last 10 years that didn't have a bad attitude. The culture of the club is shocking.