The oldest known copies of Judith are written in Greek. It is only assumed that Judith was ever written in Hebrew. Newer Hebrew copies are known forgeries.
Most of the other 39 Old Testament books are quoted by Our Saviour and the Apostles. They never quote from the Deuterocanonicles. They quote directly 263 times and allude to a quote an additional 370 times. There are no quotes of the Deuts.....nor any allusions.
The New Testament links itself directly to the Old Testament Prophets and would not cause us to suspect any other "Inspired" writings would be found.
Jerome, himself.....did not want them in the Vulgate... but was "persuaded" to include them.