PDF malware analysis — malicious · 2541ac4eb13d5759

MALICIOUS

PDF

46.9 KB Created: 2021-06-03 16:27:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24

MD5: 2e4e9160e9e6dd8c57c9740cc7799ade SHA-1: 62b8799c748d330cbe78a79e494eb49dd9e3fb33 SHA-256: 2541ac4eb13d5759f5a1c5e81383d9b040906b1d2608cb860bf13deb79846bb2

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/431946152/rbx-hut-game-hack PDF link annotation
- https://www.andrology.co.uk/uploads/files/files/can-you-still-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/robux-com-free-robux_GM431946152.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/free-robux-for-free_GM431946152.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/free-minecraft-account-generator_GM479516143.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/minecraft-windows-10-edition-free-with-java_GM479516143.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/get-free-coin-master_GM406889139.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/coin-master-hacksco_GM406889139.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/minecraft-cheats-pc-2021_GM479516143.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/coin-master-free-spins-and-coins-daily-links_GM406889139.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/roblox-piano-hack_GM431946152.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/roblox36com-free-robux_GM431946152.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/coin-master-links-for-free-spins-2021_GM406889139.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/tiktok-free-view-iphone-video_GM835599320.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/robux-com-free_GM431946152.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/how-to-get-free-tiktok-followers-without-verification_GM835599320.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/can-i-play-minecraft-for-free_GM479516143.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/freer-pro-tiktok-fans_GM835599320.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/free-robux-codes-generator-no-verification_GM431946152.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
`font_00_sfnt_off0000510e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x510E	25208 bytes
SHA-256: `c893788cc0ef082ce6d2ba5090d7e7ee2b1d765a0f2c0dbdbe35fe9e11b3dc2b`
`font_01_sfnt_off00008b69.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8B69	2968 bytes
SHA-256: `53bc671f785c2720f55140ff636fea47c593b83a4ec4df9d0dc961b905b12f85`
`font_02_sfnt_off000095a4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x95A4	17812 bytes
SHA-256: `e24951961dffee7128ae3d90f7f1153dbc58b347b85dc2bf38d5c1c57fa85777`

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