What is FlashPlayer.pkg?
FlashPlayer.pkg is a Trojan, it pretends to be a legitimate Adobe Flash installer.
This Trojan pretends to be a Adobe Flash installer. Once installed on your computer it will redirect your Google web searches to bogus websites. This Trojan is capable of changing your hosts file. After it changes the hosts file whenever you perform a search using google you will be presented with legitimate results, but when you try to click on them you will see only pop-up windows. Your Mac could have got infected with this Trojan while you were visiting misleading websites. Usually when entering such fake website you will see a video window with a big play button on it, when you click to views it, a pop-up window will appear stating that you need to update you flash player, instead of a legitimate Adobe flash player update your computer will be infected with a Trojan. You should download
updates only from legitimate sources. To prevent such Trojans as FlashPlayer.pkg infecting your Mac you should use a legitimate antivirus software.