PDF malware analysis — malicious · 9a05c3d65c5aaab1

MALICIOUS

PDF

47.3 KB Created: 2021-06-03 16:18:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-22

MD5: cb6356002e739b61d5ddb81109384df9 SHA-1: e17f2ddf96748d5d04ae706cd2ba7285200350fc SHA-256: 9a05c3d65c5aaab12a7ecdc76cf56f150bc4ed3366562c127f1b47495dd91cc7

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9769

Heuristics 4

PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE

PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
External URI info PDF_URI

PDF contains an external URL action
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL https://netcdn.online/app/406889139/free-coins-coin-master-spins-game-hack PDF link annotation
- https://www.andrology.co.uk/uploads/files/files/how-to-get-free-robux-without-downloading-apps-2021_GM431946152.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/coin-master-game-free-spin-download_GM406889139.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/tryrbx-site-free-robux_GM431946152.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/free-robux-glitch_GM431946152.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/minecraft-pe_GM479516143.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/coin-master-hack-app_GM406889139.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/robux-free-c_GM431946152.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/coin-master-hack-spins-ios_GM406889139.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/minecraft-client-download_GM479516143.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/minecraft-free-unblocked_GM479516143.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/coin-master-facebook-hack_GM406889139.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/how-to-hack-a-minecraft-account_GM479516143.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/real-free-robux-generator_GM431946152.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/robux-hack-2021_GM431946152.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/minecraft-bedrock-edition-pc-download-free_GM479516143.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/roblox-promo-codes-generator-no-human-verification_GM431946152.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/free-minecraft-skins-girl_GM479516143.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdfIn PDF document text
- http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_004_off0000507e.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x507E	30248 bytes
SHA-256: `3e2dfe1d258d2b5262b5bb518deb4972cf6c1f3cb8ce12847d4ed3ff1a6bf468`
`font_01_sfnt_off00008dac.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8DAC	2840 bytes
SHA-256: `3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676`
`font_02_sfnt_off0000975e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x975E	17884 bytes
SHA-256: `2acdf213e8e807bc487a80aadd43e8577e55ab076d243b65afc8816f4882cfa2`

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