"Nefarious intent" refers to a person's evil or wicked purpose or plan. It means they are intentionally wanting to do something harmful, dishonest, or morally wrong. Full definition
Giving a tiny inspirational nod to the great dynamic duo Banjo - Kazooie, a wicked, green - skinned witch kidnaps a cluster of chicks with nefarious intent and it's up to their fowl friend and his wiggly worm companion to work together and save the day. (nintendowire.com)
Anyone with a Y chromosome who approaches those places is displaying bad taste at best and nefarious intent at worst. (religion.blogs.cnn.com)
That said, Sweeney said he couldn't recall any previous instance of collusion or other nefarious intent by oil companies to raise prices in California. (scientificamerican.com)