Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c961fe4253a1f93…

MALICIOUS

PDF

34.7 KB Created: 2021-07-07 22:54:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 0f9f01e1b09d09bd1c204cdd9cbdf8e7 SHA-1: d12c738621225c29d6fa26f00b997bf40fe9164c SHA-256: 8c961fe4253a1f93e2f74efe7131cc17900b2d0ed3a148a1a21b1ad427b9b583
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-hack-tool-access-online-generator-game-hack PDF link annotation
    • https://radiocaxias.com.br/portal/imagens/files/free-robux-group-payouts_GM431946152.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/free-roblox-gg_GM431946152.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/coin-master-free-spain_GM406889139.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/hack-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/free-robux-quiz_GM431946152.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/roblox-free-clothes-codes_GM431946152.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/how-do-you-earn-robux_GM431946152.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/free-robux-just-enter-username-and-password_GM431946152.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/tiktok-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/roblox-moderators_GM431946152.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/free-non-virus-recorder-for-roblox-for-laptop_GM431946152.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/roblox-admin-hack-scropt_GM431946152.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/gaming-cheatscom-roblox-us_GM431946152.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/how-to-get-1-million-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/free-robux-no-human-verification-no-inspect-2021_GM431946152.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/roblox-admin-hack-no-download_GM431946152.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/free-likes-on-tiktok_GM835599320.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/how-to-get-free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003199.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3199 23172 bytes
SHA-256: ddb7c7d819363c042dbc85e3a01712a5548204830f972677d350186b8ae40f40
font_01_sfnt_off000065c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65C5 18080 bytes
SHA-256: 466388122f55d8099f8a2cc4a3f5b35df7f53bc4c57d622fd163220439f445a2

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