Despite the best efforts of Back Bay author Joseph Finder to hype it, the movie based on his bestselling book, “Paranoia,” is about to disappear without a trace. The techno-thriller starring Liam Hemsworth, Harrison Ford, and Gary Oldman made just $3.5 million in its first weekend — about one-tenth what it cost to make. In the days and weeks leading up to the film’s release, Finder, understandably, had promoted the film relentlessly on Twitter and Facebook. It’s not clear why it fared so poorly at the box office, but it may be that Hemsworth, who’s best known for his work on “The Hunger Games” franchise, can’t carry a film on his own, or maybe “Paranoia” was just badly promoted. But this isn’t Finder’s first rodeo. His book, “High Crimes,” was turned into a film in 2002 starring Ashley Judd and Morgan Freeman. (That movie made $14 million in its first weekend and ultimately grossed $41.5 million.) Reached Thursday via e-mail, Finder would say only that he’s canceling his order for a red Ferrari. . . . Meanwhile, we’re told Patriots owner Robert Kraft paid a visit to the set of “The Judge” in Westwood Thursday. A few weeks ago, you’ll recall, Robert Duvall, one of the stars of the movie, attended Pats training camp and took a picture with QBs Tom Brady and Tim Tebow. Duvall’s costar in the movie is Robert Downey Jr., with whom Kraft’s girlfriend, Ricki Lander, appeared in “Iron Man.” Lander, an actress, played a flight attendant in the movie.