Gordon Strachan's side fell to a 2-1 loss at home despite taking the lead in the manager's first competitive game in charge and the result leaves the Scots bottom of Group A ahead of their trip to Serbia on Tuesday.
Maloney told The Herald: "It's a very low dressing room. The last 20 minutes, when we were down to 10 men, it was very difficult to even get near the ball.
|21/4||The Tartan Army are 21/4 with BetVictor to beat Serbia by any score on Tuesday
"The next couple of days it will be difficult to get any sort of positives. After a couple of days we might find the odd one. Grant Hanley played particularly well for us in one of his first matches.
"And then with that it's going to be pretty difficult.
"For the first 15 minutes Wales were dominant and after that we kind of got to grips with it. That might be a slim positive for us."
Maloney hopes Strachan's side can somehow record a result against Serbia to restore some pride for the players and fans.
"It would be massive for the confidence for the team," the Wigan player added. "We have spoken about the confidence being low.
"We know we have to improve to get anything out there and it's going to be very difficult. We just need to keep believing in the squad and hopefully this can turn round."