The ongoing Sony hacking scandal has brought many of the film studio’s secrets and transgressions to light, including one involving the earnings of the stars of “American Hustle,” the 2013 David O. Russell-directed film with local ties. In the latest leaked Sony e-mails, between Columbia Pictures president of business affairs Andrew Gumpert and Sony co-chair Amy Pascal, it was revealed that Jennifer Lawrence and Amy Adams were paid less than their male costars despite both earning Academy Award nominations for their roles. According to the 2013 e-mails, unearthed by The Daily Beast, Lawrence and Adams were paid only 7 percent of the film’s profit, while Christian Bale, Bradley Cooper, and Jeremy Renner all received 9 percent. “American Hustle,” which earned more than $251 million at the box office, was filmed primarily in Boston and Worcester, and many locals worked as extras on the film. The “American Hustle” gender pay gap is part of a trend at Sony, other e-mails have revealed. Seventeen of the studio’s top-earning executives are men, while only one woman — Pascal — earns upward of $1 million.