Is it safe to open an attachment?

Treat it as you would any file from that source. An attachment inside a document is not vouched for by the document.

Why does my PDF have attachments I did not know about?

Some tools embed source data automatically. It is worth checking before sharing.

Not yet. For now, extract them so you know what is there.

extract

Extract PDF Attachments

Pull out files embedded inside a PDF.

Runs in your browser

How it works

PDFs can carry other files inside them — a spreadsheet behind a report, source data behind an invoice — and most readers make these easy to miss. This lists what is there and lets you save it. PDFdesk never opens or runs an attachment; it only extracts it.

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Questions

Is it safe to open an attachment?: Treat it as you would any file from that source. An attachment inside a document is not vouched for by the document.
Why does my PDF have attachments I did not know about?: Some tools embed source data automatically. It is worth checking before sharing.
Can I remove them?: Not yet. For now, extract them so you know what is there.