PDF malware analysis — malicious · adc46efc81b22957

MALICIOUS

PDF

34.7 KB Created: 2021-07-03 11:23:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18

MD5: 407f891914edc8841d448ddc7b2433f4 SHA-1: e17dca697a14e7a16015852be678d50ce2d87c5c SHA-256: adc46efc81b2295704007dbeb2b6c2a26466735ea5303c3b02c8a06980866ea4

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-cheat-robux-game-hack PDF link annotation
- https://radiocaxias.com.br/portal/imagens/files/coin-master-hack-september-2021_GM406889139.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/roblox-noclip-in-cheat-engine-2021_GM431946152.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/rainbow-orange-roblox-free_GM431946152.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/free-roblox-gift-card-codes-2021_GM431946152.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/robux-for-surveys_GM431946152.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/collect-free-spin-linms-coin-master_GM406889139.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/roblox-zall-site-free-robux_GM431946152.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/oginject-co_GM406889139.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/free-robux-xbox-one-2021_GM431946152.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/free-spin-link-for-coin-master-game_GM406889139.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/card-hack-in-coin-master_GM406889139.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/how-to-get-things-free-on-roblox_GM431946152.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/free-robux-site_GM431946152.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/free-stuff-on-roblox-2021_GM431946152.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/how-to-get-free-minecoins-in-minecraft_GM479516143.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/all-coin-master-spin-link-and-free-download_GM406889139.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/free-roblox-toys_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
`font_00_sfnt_off00003306.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x3306	21800 bytes
SHA-256: `228fc9d6e8c3f8fa009fa158aed0184b758be25cc91486801be99e93e73ccbac`
`font_01_sfnt_off00006305.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6305	18896 bytes
SHA-256: `922389806b7f491697ff28620e7b275538dde8f96f9a13fe3cb104b646346471`

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