There are several options to convert text from PDF to Word 1 - the easiest in terms of text only is - file - save as - text 2 - another way with pictures or tables is via online paid - file - save as - word or excel online or free conversion, for example
http://www.pdfonline.com/pdf-to-word-converter/ 3 - use the free or paid program directly, of which there are a large number of, for example, OCR - ABBYY FineReader, or various PDF Tools, will be preserved here original structure of pdf file 4 - by copying the image, ie editing - make the image with the cursor (cross, not arrow) by holding the enter button on the mouse and scrolling to select the selected part, after releasing the button the selected space is automatically saved to the clipboard and CTRL_V to paste it into Word as picture. (It lacks a kind of staff elegance, but still often used mainly by the media)