Regarding malinformation, we talk a lot about fabricated content or false content, but there is a way to use genuine content to cause harm. For example, leaking emails that were previously private and making them public might be a form of malinformation. There is a form of a whistle-blowing leak where that's done for the public good, so malinformation is to leak information to cause harm.
On October 16th, 2018. See this statement in context.