Catalyzes the hydrolysis of a carbon-carbon bond in 4,5: 9,10-diseco-3-hydroxy-5,9,17-trioxoandrosta-1(10),2-diene-4-oate (4,9-DSHA) to yield 9,17-dioxo-1,2,3,4,10,19-hexanorandrostan-5-oate (DOHNAA) and 2-hydroxy-hexa-2,4-dienoate (HHD). Also involved in biphenyl and polychlorinated biphenyls (PCBs) degradation. (1E,2Z)-3-hydroxy-5,9,17-trioxo-4,5:9,10-disecoandrosta-1(10),2-dien-4-oate + H2O = (2Z,4Z)-2-hydroxyhexa-2,4-dienoate + 3-[(3aS,4S,7aS)-7a-methyl-1,5-dioxo-octahydro-1H-inden-4-yl]propanoate + H(+) Lipid metabolism; steroid biosynthesis. Homodimer. Belongs to the AB hydrolase superfamily. HsaD family.