PDF malware analysis — malicious · 711fb0d04cd2cfac

MALICIOUS

PDF

46.1 KB Created: 2021-05-17 08:06:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-22

MD5: 360cad80cc24d074894a85fb40d6c3f0 SHA-1: 75f5fcf0daf830609598689cce0351d1455e0616 SHA-256: 711fb0d04cd2cfac6ea63a4455786e61c630d694c1fd0bafa9b0a3c137122bdc

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 0.9432

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.xyz/app/431946152/give-me-free-robux-game-hack PDF link annotation
- https://cursocejas.com.br/imagens/userfiles/files/roblox-re_GM431946152.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/free-minecraft-skin-maker_GM479516143.pdfIn PDF document text
- https://cursocejas.com.br/imagens/userfiles/files/free-roblox-shirt-templates_GM431946152.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/coin-master-free-gift-link-2021_GM406889139.pdfIn PDF document text
- https://cursocejas.com.br/imagens/userfiles/files/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
- https://cursocejas.com.br/imagens/userfiles/files/free-robux-generator-2021_GM431946152.pdfIn PDF document text
- https://cursocejas.com.br/imagens/userfiles/files/free-spin-and-daily-news-coin-master_GM406889139.pdfIn PDF document text
- https://cursocejas.com.br/imagens/userfiles/files/coin-master-daily-spin-free_GM406889139.pdfIn PDF document text
- https://cursocejas.com.br/imagens/userfiles/files/get-free-robux-gg_GM431946152.pdfIn PDF document text
- https://cursocejas.com.br/imagens/userfiles/files/real-hack-for-coin-master_GM406889139.pdfIn PDF document text
- https://cursocejas.com.br/imagens/userfiles/files/haktuts-coin-master-free-spin-link-today_GM406889139.pdfIn PDF document text
- https://cursocejas.com.br/imagens/userfiles/files/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
- https://cursocejas.com.br/imagens/userfiles/files/minecraft-hacked-client-download_GM479516143.pdfIn PDF document text
- https://cursocejas.com.br/imagens/userfiles/files/cute-free-roblox-clothes_GM431946152.pdfIn PDF document text
- https://cursocejas.com.br/imagens/userfiles/files/coin-master-free-spin-daily-link_GM406889139.pdfIn PDF document text
- https://cursocejas.com.br/imagens/userfiles/files/roblox-free-printables_GM431946152.pdfIn PDF document text
- https://cursocejas.com.br/imagens/userfiles/files/coin-master-free-spins-bit-ly_GM406889139.pdfIn PDF document text
- https://cursocejas.com.br/imagens/userfiles/files/how-to-get-free-coins-and-spins-on-coin-master_GM406889139.pdfIn PDF document text
- https://www.roblox.coIn 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
`stream_003_off00004986.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4986	26172 bytes
SHA-256: `11195bc4268f86a24a5c4480c8f61efcf36c214972078fc3bebe86da5958512e`
`font_01_sfnt_off00008738.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8738	2928 bytes
SHA-256: `06f24dbb71a750287de0652f3b7dd32a8ddd9b1b2cc1fdba53637417e92ab342`
`font_02_sfnt_off00009155.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9155	18444 bytes
SHA-256: `68319dbf483afe81c5a4de3b3f5290fc223d358c0f75f000dd988daf46eb7eae`

Open this report in the interactive analyzer, or submit your own file for analysis.