PDF malware analysis — malicious · 47ac57175b1bf397

MALICIOUS

PDF

50.3 KB Created: 2021-06-03 16:30:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: 8932da4b16b5801012a592ab7ff6149f SHA-1: 0f2270ba8ff7e8f0a08b55b5c2cdd04bc6f093f8 SHA-256: 47ac57175b1bf39715dc2c4073baceeb37f2563df17efc5935da9e05c0f4f916

122 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a fake-CAPTCHA lure. 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 5

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.
Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA

Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
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/free-robux-codes-2021-real-game-hack PDF link annotation
- https://www.jcn.co.uk/uploads/files/files/free-roblox-accounts-that-work_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-minecraft-skins-xbox-one_GM479516143.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-minecraft-gift-card_GM479516143.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/bloxland-earn-free-robux_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-minecraft-maps_GM479516143.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/how-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/minecraft-windows-10-hack-client-2021_GM479516143.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/roblox-free-robux_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/hack-version-of-coin-master-apk-download_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/minecraft-maps-pe-free-download_GM479516143.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/coin-master-spin-link-today_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/how-to-make-free-robux_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-tiktok-app_GM835599320.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/i-got-hacked-on-roblox_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_off000052be.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x52BE	28636 bytes
SHA-256: `7231b0592a7595a581594a80ef56aca952a6845433fee8cea92bb56f4d58ad17`
`font_01_sfnt_off00009401.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9401	3660 bytes
SHA-256: `a6c2b5ddab515e81440225140b87185158f8fc8af9677c726bbb2f485b2e6976`
`font_02_sfnt_off0000a031.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA031	18892 bytes
SHA-256: `79fc292783aafa0d2798f175881928b0c75cb864ff282a378c41953696f75480`

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