PDF malware analysis — malicious · 17a9686579e72806

MALICIOUS

PDF

35.3 KB Created: 2021-07-05 06:20:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24

MD5: 74b96662bbe9d997254a4446e808a6f8 SHA-1: e236d86f6d1a7e8c34a39825d1a8c2bffcccc097 SHA-256: 17a9686579e72806ef90273e4ac4f463cfc5ec387ff816b60327104a4a87c72a

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 0.9980

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 http://netcdn.tw/app/431946152/earn-free-robux-today-game-hack PDF link annotation
- https://cursocejas.com.br/imagens/userfiles/files/pubg-uc-icon_GM1330123889.pdfIn PDF document text
- https://cursocejas.com.br/imagens/userfiles/files/free-links-coin-master_GM406889139.pdfIn PDF document text
- https://cursocejas.com.br/imagens/userfiles/files/free-russian-flag-roblox-t-shirt_GM431946152.pdfIn PDF document text
- https://cursocejas.com.br/imagens/userfiles/files/get-me-free-robux_GM431946152.pdfIn PDF document text
- https://cursocejas.com.br/imagens/userfiles/files/how-to-become-a-hacker-in-roblox_GM431946152.pdfIn PDF document text
- https://cursocejas.com.br/imagens/userfiles/files/minecraft-games-to-play-for-free_GM479516143.pdfIn PDF document text
- https://cursocejas.com.br/imagens/userfiles/files/pokemon-go-free-hack-download_GM1094591345.pdfIn PDF document text
- https://cursocejas.com.br/imagens/userfiles/files/free-roblox-combos_GM431946152.pdfIn PDF document text
- https://cursocejas.com.br/imagens/userfiles/files/how-to-make-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
- https://cursocejas.com.br/imagens/userfiles/files/boku-no-roblox-cheat_GM431946152.pdfIn PDF document text
- https://cursocejas.com.br/imagens/userfiles/files/10-free-spins-coin-master_GM406889139.pdfIn PDF document text
- https://cursocejas.com.br/imagens/userfiles/files/google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
- https://cursocejas.com.br/imagens/userfiles/files/roblox-sand-simulator-hack-for-android-2021_GM431946152.pdfIn PDF document text
- https://cursocejas.com.br/imagens/userfiles/files/como-hackear-coin-master-2021_GM406889139.pdfIn PDF document text
- https://cursocejas.com.br/imagens/userfiles/files/how-to-hack-roblox-passwords_GM431946152.pdfIn PDF document text
- https://cursocejas.com.br/imagens/userfiles/files/free-robux-generator-100-working_GM431946152.pdfIn PDF document text
- https://cursocejas.com.br/imagens/userfiles/files/roblox-help-free-robux_GM431946152.pdfIn PDF document text
- https://cursocejas.com.br/imagens/userfiles/files/coin-master-free-spins-and-coins-today_GM406889139.pdfIn PDF document text
- https://cursocejas.com.br/imagens/userfiles/files/mad-city-roblox-hack-apk_GM431946152.pdfIn PDF document text
- https://cursocejas.com.br/imagens/userfiles/files/google-coin-master-free-spins_GM406889139.pdfIn PDF document text
- http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000354c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x354C	21644 bytes
SHA-256: `7fff1606fe5cf250dec5ae7eb1be32b6daf0e46d38173ce85e7173d0afadc24e`
`font_01_sfnt_off000064c1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x64C1	19072 bytes
SHA-256: `82db6ce193e18a75fae7aab420d9e740a3b7c910ba2cb20ee9d5d98feb1db9a0`

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