As with most News Corp outlets, the news side of the WSJ leans pretty far to the right (it did so even before it was a News Corp outlet, though not as much), it only seems “liberal” by comparison with its own opinion section.
That said, unlike, say, Fox News, the WSJ news side at least makes an effort to adhere to traditional journalistic norms, its right wing bias is more evident in agenda-setting (story selection, devotion of space, and placement/promotion), and less in commentary and outright fabrications in “news” content.