PDF malware analysis — malicious · 910899db7b7a1ede

MALICIOUS

PDF

35.9 KB Created: 2021-07-05 15:37:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25

MD5: 1f5e2ef4294d842e15a3e7d988d746e1 SHA-1: 950cd3ae51fc12e00e90674b76ba832ccd8e8bf7 SHA-256: 910899db7b7a1ede43dea09eb06a93ff412cbb2aa84e23455d009c45cbad24ff

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

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/406889139/coin-master-free-spins-link-facebook-page-game-hack PDF link annotation
- https://cursocejas.com.br/imagens/userfiles/files/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
- https://cursocejas.com.br/imagens/userfiles/files/free-noob-clothes-roblox_GM431946152.pdfIn PDF document text
- https://cursocejas.com.br/imagens/userfiles/files/comment-cheat-sur-roblox-avec-cheat-engine_GM431946152.pdfIn PDF document text
- https://cursocejas.com.br/imagens/userfiles/files/rxfastml-generator-2021-robux-hack_GM431946152.pdfIn PDF document text
- https://cursocejas.com.br/imagens/userfiles/files/hack-coin-master-free_GM406889139.pdfIn PDF document text
- https://cursocejas.com.br/imagens/userfiles/files/coin-free-master_GM406889139.pdfIn PDF document text
- https://cursocejas.com.br/imagens/userfiles/files/coin-master-free-link-today_GM406889139.pdfIn PDF document text
- https://cursocejas.com.br/imagens/userfiles/files/online-coin-master-free-spin-app_GM406889139.pdfIn PDF document text
- https://cursocejas.com.br/imagens/userfiles/files/crear-cuenta-hack-en-roblox_GM431946152.pdfIn PDF document text
- https://cursocejas.com.br/imagens/userfiles/files/coin-master-hacks-that-actually-work_GM406889139.pdfIn PDF document text
- https://cursocejas.com.br/imagens/userfiles/files/coinmaster-com_GM406889139.pdfIn PDF document text
- https://cursocejas.com.br/imagens/userfiles/files/coin-master-no-download-app-but-play-for-free_GM406889139.pdfIn PDF document text
- https://cursocejas.com.br/imagens/userfiles/files/how-to-hack-club-tesla-roblox_GM431946152.pdfIn PDF document text
- https://cursocejas.com.br/imagens/userfiles/files/hacking-robloxs-account_GM431946152.pdfIn PDF document text
- https://cursocejas.com.br/imagens/userfiles/files/how-to-use-tiktok-for-free_GM835599320.pdfIn PDF document text
- https://cursocejas.com.br/imagens/userfiles/files/cheat-roblox-shark-bite_GM431946152.pdfIn PDF document text
- https://cursocejas.com.br/imagens/userfiles/files/free-roblox-wings_GM431946152.pdfIn PDF document text
- https://cursocejas.com.br/imagens/userfiles/files/minecraft-xray-hack_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/roblox-games-with-free-boombox_GM431946152.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
`stream_002_off00003468.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x3468	23160 bytes
SHA-256: `98f334f06579203e231da3a9483c5d29c2e4d7132b424335bee643bf5f956f2e`
`font_01_sfnt_off00006894.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6894	18656 bytes
SHA-256: `89eea19505d51e592afe5e27b7406d8b413666f07e3cf0068fd223b3681a9c64`

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