Libreoffice is supposed to be able to edit pdf files. I can't tell you for sure because I don't use it, but it must be worth a look. In fact I use Abiword and even it can edit them and save them as .odt so you could try that instead if you don't want the Libreoffice bloatware.
Fujitsu Lifebook AH532. Intel i5 processor, 6Gb ram, Intel HD3000 graphics, Intel Audio/wifi. Realtek RTL8111/8168B Ethernet.Lubuntu 13.10,Ubuntu12.10 (Unity), Mint16 (Cinnamon), Manjaro (Xfce).