PDF malware analysis — malicious · 8ea5aa71a20da643

MALICIOUS

PDF

36.1 KB Created: 2021-07-04 20:13:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24

MD5: 4762495eb02f72ba9fc4025bb5457e76 SHA-1: 5a71c831fea3ccfb49171b322f812ffd8608b20c SHA-256: 8ea5aa71a20da643a738a309b2257c276ba0aa67d9d1fee00d879e220b80a808

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/roblox-hacking-website-game-hack PDF link annotation
- https://cursocejas.com.br/imagens/userfiles/files/where-tiktok-free-view-iphone-11_GM835599320.pdfIn PDF document text
- https://cursocejas.com.br/imagens/userfiles/files/coin-master-free-spins-link-download-today_GM406889139.pdfIn PDF document text
- https://cursocejas.com.br/imagens/userfiles/files/i-didnt-get-my-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
- https://cursocejas.com.br/imagens/userfiles/files/minecraft-mods-download-free_GM479516143.pdfIn PDF document text
- https://cursocejas.com.br/imagens/userfiles/files/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
- https://cursocejas.com.br/imagens/userfiles/files/get-more-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
- https://cursocejas.com.br/imagens/userfiles/files/how-do-you-upload-audio-to-roblox-for-free_GM431946152.pdfIn PDF document text
- https://cursocejas.com.br/imagens/userfiles/files/robux-hack-robux-no-survey_GM431946152.pdfIn PDF document text
- https://cursocejas.com.br/imagens/userfiles/files/what-is-exploiting-in-roblox_GM431946152.pdfIn PDF document text
- https://cursocejas.com.br/imagens/userfiles/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
- https://cursocejas.com.br/imagens/userfiles/files/free-robux-com-2021_GM431946152.pdfIn PDF document text
- https://cursocejas.com.br/imagens/userfiles/files/coin-master-free-spons-apk-2021_GM406889139.pdfIn PDF document text
- https://cursocejas.com.br/imagens/userfiles/files/minecraft-free-download-android-apk_GM479516143.pdfIn PDF document text
- https://cursocejas.com.br/imagens/userfiles/files/coin-master-update-2021_GM406889139.pdfIn PDF document text
- https://cursocejas.com.br/imagens/userfiles/files/roblox-free-epic-face_GM431946152.pdfIn PDF document text
- https://cursocejas.com.br/imagens/userfiles/files/roblox-font-free_GM431946152.pdfIn PDF document text
- https://cursocejas.com.br/imagens/userfiles/files/simplysarc_GM479516143.pdfIn PDF document text
- https://cursocejas.com.br/imagens/userfiles/files/50-000-free-spins-coin-master_GM406889139.pdfIn PDF document text
- https://cursocejas.com.br/imagens/userfiles/files/free-roblox-robux-codes-2021_GM431946152.pdfIn PDF document text
- https://cursocejas.com.br/imagens/userfiles/files/pubg-uc-emoji_GM1330123889.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_off0000345e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x345E	22952 bytes
SHA-256: `c7005edeb8309c91402df98c88f49665584982346038a0e14a51fbe2d4ed4d6f`
`font_01_sfnt_off00006803.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6803	19076 bytes
SHA-256: `62b0d36ce948ffdc11f28ab91e3b337edea8e9919308700d4ef5645592577123`

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