Created
November 7, 2020 13:47
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Create a PDF manually with JavaScript
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| const fs = require('fs'); | |
| /** | |
| * Source: Mario's Security Blog - http://mariomalwareanalysis.blogspot.com/2012/02/how-to-manually-create-pdf.html | |
| */ | |
| function generatePDF() { | |
| const lines = []; | |
| lines.push(`%PDF-1.3`); | |
| lines.push(`%\xFF\xFF\xFF\xFF`); | |
| lines.push(``); | |
| lines.push(`1 0 obj`); | |
| lines.push(`<<`); | |
| lines.push(`/Type /Catalog`); | |
| lines.push(`%/OpenAction`); | |
| lines.push(`/Pages 2 0 R`); | |
| lines.push(`>>`); | |
| lines.push(`endobj`); | |
| lines.push(``); | |
| lines.push(`2 0 obj`); | |
| lines.push(`<<`); | |
| lines.push(`/Type /Pages`); | |
| lines.push(`/Count 1`); | |
| lines.push(`/Kids [3 0 R]`); | |
| lines.push(`>>`); | |
| lines.push(`endobj`); | |
| lines.push(``); | |
| lines.push(`3 0 obj`); | |
| lines.push(`<<`); | |
| lines.push(`/Type /Page`); | |
| lines.push(`/Parent 2 0 R`); | |
| lines.push(`/Resources << /Font << /F1 5 0 R >>`); | |
| lines.push(`>>`); | |
| lines.push(`/MediaBox [0 0 612 792]`); | |
| lines.push(`/Contents 4 0 R`); | |
| lines.push(`>>`); | |
| lines.push(`endobj`); | |
| lines.push(``); | |
| lines.push(`4 0 obj`); | |
| lines.push(`<< /Length 45 >>`); | |
| lines.push(`stream`); | |
| lines.push(`BT`); | |
| lines.push(`/F1 24 Tf`); | |
| lines.push(`250 700 Td (Hello, World!) Tj`); | |
| lines.push(`ET`); | |
| lines.push(`endstream`); | |
| lines.push(`endobj`); | |
| lines.push(``); | |
| lines.push(`5 0 obj`); | |
| lines.push(`<<`); | |
| lines.push(`/Type /Font`); | |
| lines.push(`/Subtype /Type1`); | |
| lines.push(`/BaseFont /Helvetica`); | |
| lines.push(`>>`); | |
| lines.push(`endobj`); | |
| lines.push(``); | |
| lines.push(`xref`); | |
| lines.push(`0 6`); | |
| lines.push(`trailer`); | |
| lines.push(`<<`); | |
| lines.push(`/Size 6`); | |
| lines.push(`/Root 1 0 R`); | |
| lines.push(`>>`); | |
| lines.push(`startxref`); | |
| lines.push(`%%EOF`); | |
| fs.writeFileSync('./test.pdf', lines.join('\n')); | |
| } | |
| generatePDF(); |
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A screenshot of the output of the above function.