Iwork pages uses a native format which can’t be opened from Openoffice nor Wordperfect nor Microsoft word…
All solutions I found involve using a macintosh or a paid Apple account whereas I was sent a document in .pages format and I have nothing which is Apple related.
For just a short look, rename it to .zip, create a temporary folder and unzip it there. The file preview.jpg will contain the rendered first page of the document in 72dpi.
If you are interested in the text, you can try to filter Index/Document.iwa for readable text.
