Malicious PDF — malware analysis report

Static analysis result for SHA-256 9527b9b3aa061659…

MALICIOUS

PDF

32.5 KB Created: 2021-07-03 18:04:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 7e0f0abc7967f26883aa08be777f9a2a SHA-1: 7de5e7889d7cf966f414e492a62989d997938069 SHA-256: 9527b9b3aa061659dff41915b66632926846ccce76e897d11997242437209600
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and references to game hacks and free currency generators for popular games like Roblox and Coin Master. The primary link, http://netcdn.tw/app/431946152/girl-roblox-avatar-game-hack, is identified as a lure for game hacks. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a social engineering tactic to redirect users to potentially malicious websites. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/girl-roblox-avatar-game-hack PDF link annotation
    • https://radiocaxias.com.br/portal/imagens/files/robux-gratis-hackear_GM431946152.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/do-you-get-free-robux-roblox_GM431946152.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/free-robux-apk_GM431946152.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/free-tiktok-followers-in-5-minutes_GM835599320.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/hack-the-coin-master-game_GM406889139.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/free-minecraft-java-account_GM479516143.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/how-to-get-free-robux-for-kids_GM431946152.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/hack-camisetas-roblox_GM431946152.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/how-to-hack-coin-master-using-es-file_GM406889139.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/roblox-work-at-a-pizza-place-cheats-2021_GM431946152.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/how-to-get-2021-robux-for-free_GM431946152.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/free-roblox-gift-card_GM431946152.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/is-tiktok-app-free_GM835599320.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/coin-master-free-box_GM406889139.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/free-robux-today-hack_GM431946152.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/roblox-how-to-create-a-group-for-free_GM431946152.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/mcpe-master-hack-coin-apk_GM406889139.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_off000029fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29FE 22184 bytes
SHA-256: a04c69135cbb87392f3b75bb17e1d0cc602dbc592703f583adb99fd3d494b7b3
font_01_sfnt_off00005af3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AF3 18824 bytes
SHA-256: 5de93663545e585bb3ec51caaed0e7665131e60661237b1a7a5d41b420e717e4

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