PDF malware analysis — malicious · eb3750c818a25480

MALICIOUS

PDF

34.2 KB Created: 2021-07-07 23:02:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24

MD5: 1cad64d8e5cb71de5b8f387093b0ca79 SHA-1: 6dd54ee8f4a62123321b62406605ead91c3bb85e SHA-256: eb3750c818a254804b95a974a355aedf6a0a3bdbd8fb5eda847e358cecacf56a

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/406889139/coin-master-blogspot-free-spins-game-hack PDF link annotation
- https://cursocejas.com.br/imagens/userfiles/files/coin-master-hacks-for-iphone_GM406889139.pdfIn PDF document text
- https://cursocejas.com.br/imagens/userfiles/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
- https://cursocejas.com.br/imagens/userfiles/files/one-piece-roblox-hack_GM431946152.pdfIn PDF document text
- https://cursocejas.com.br/imagens/userfiles/files/coin-master-heaven-free-spins_GM406889139.pdfIn PDF document text
- https://cursocejas.com.br/imagens/userfiles/files/get-free-robux-now_GM431946152.pdfIn PDF document text
- https://cursocejas.com.br/imagens/userfiles/files/coin-master-free-spins-may-11-2021_GM406889139.pdfIn PDF document text
- https://cursocejas.com.br/imagens/userfiles/files/coin-master-levels_GM406889139.pdfIn PDF document text
- https://cursocejas.com.br/imagens/userfiles/files/make-free-robux_GM431946152.pdfIn PDF document text
- https://cursocejas.com.br/imagens/userfiles/files/free-spin-links-coin-master-2021_GM406889139.pdfIn PDF document text
- https://cursocejas.com.br/imagens/userfiles/files/roblox-hacks-for-mac_GM431946152.pdfIn PDF document text
- https://cursocejas.com.br/imagens/userfiles/files/free-roblox-card-codes_GM431946152.pdfIn PDF document text
- https://cursocejas.com.br/imagens/userfiles/files/free-apk-mods-coin-master_GM406889139.pdfIn PDF document text
- https://cursocejas.com.br/imagens/userfiles/files/alone-hacks-roblox_GM431946152.pdfIn PDF document text
- https://cursocejas.com.br/imagens/userfiles/files/clean-master-coins-hack_GM406889139.pdfIn PDF document text
- https://cursocejas.com.br/imagens/userfiles/files/roblox-cheats-for-operation-squoprion_GM431946152.pdfIn PDF document text
- https://cursocejas.com.br/imagens/userfiles/files/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
- https://cursocejas.com.br/imagens/userfiles/files/best-free-roblox-screen-recorder_GM431946152.pdfIn PDF document text
- https://cursocejas.com.br/imagens/userfiles/files/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
- https://cursocejas.com.br/imagens/userfiles/files/coin-master-free-coins-and-spins-group_GM406889139.pdfIn PDF document text
- https://cursocejas.com.br/imagens/userfiles/files/free-coin-master-spin-and-coin-link_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_off000031cc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x31CC	21976 bytes
SHA-256: `afb9b6dbf6b53958db5321d9f5a1fa4b979def1d8369ebaaa5e84bf0e2fc197c`
`font_01_sfnt_off0000624b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x624B	18464 bytes
SHA-256: `44dfcd16e445fd6131b632965a2ae8aa6e64228f7c7e1827c044d7649ca93925`

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