PDF malware analysis — malicious · 11bb9f9a0eff33b0

MALICIOUS

PDF

37.2 KB Created: 2021-06-19 22:15:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18

MD5: b5b224064081a62efc2b6d8f5e887ce2 SHA-1: aa0edbd5adb6023b9bfa51b1950dd395c401a32c SHA-256: 11bb9f9a0eff33b0a5c7a0f876cc16a158fd3e0d521deac67b479aefa4d82855

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.co/app/431946152/how-to-get-free-bc-on-roblox-2021-game-hack PDF link annotation
- https://radiocaxias.com.br/portal/imagens/files/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/roblox-the-final-stand-2-money-hack_GM431946152.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/robux-hacks-2021_GM431946152.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/coin-master-hack-apk-2021-download_GM406889139.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/earn-free-robux_GM431946152.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/how-to-cheat-in-roblox-booga-booga_GM431946152.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/doctor-louie-roblox_GM431946152.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/coin-master-promo-code-2021_GM406889139.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/roblox-cheat-robux_GM431946152.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/roblox-gift-card-for-free_GM431946152.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/free-promocodes-roblox-2021_GM431946152.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/hacker-roblox-id-code_GM431946152.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/freerobux-hack-us_GM431946152.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/coin-master-twitter_GM406889139.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/minecraft-build-hacks_GM479516143.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/easy-robux-generator_GM431946152.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/roblox-free-pets_GM431946152.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/minecraft-games-to-play-for-free_GM479516143.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_off0000381f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x381F	23032 bytes
SHA-256: `d4888961a177ece209cab31f7522ff74be7f704ecb6f2e11e2091997d774cf8d`
`font_01_sfnt_off00006bb5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6BB5	19320 bytes
SHA-256: `0614787847ec447f721494fe15349f2f03e6fafe2a6571fbc52abb701ebac523`

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