Catch php file not found exception

Scrolling through my nginx errors log today, I noticed few attempts to access /wp-login.php which I believe to be the wordpress login page The server simply returns File not found. but I wanted to abort(404) instead I tried to add this login in my Exception Handler like this

    public function render($request, Exception $exception)
    {
        if($exception instanceof \Illuminate\Contracts\Filesystem\FileNotFoundException) {
            abort(404);
        }
        return parent::render($request, $exception);
    }

But this seems to be catching file storage not found exception is there a way to catch file not found exceptions in the public directory?