itextsharp - Extract Signature Details from Signed Pdf -
this signature got when signing pdf

from which, there way signatory(in signature suniiii). able extract location, date , reason except signatory.
first of all, image see includes textual information can freely chosen signing application. such visualizations text chosen match information invisibly stored in signature field mischievous signer may insert differences. thus, first have decide whether want text signature appearance or values stored invisibly in field.
if want read exact text visualization, use code answers question "get layer2 text (signature description) signature image using itextsharp".
if want read exact content invisible field information, use values of signature field value dictionary location, date, , reason, , read cms signature container contents, extract signer certificate, , read owner dn.