Malicious PDF — malware analysis report

Static analysis result for SHA-256 9448b46a7f92f51b…

MALICIOUS

PDF

33.2 KB Created: 2021-07-04 09:59:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 049b8ff37b766fe74d6bcd2a423bd0d6 SHA-1: 1dd95506fe6b6d9f392658fe0a07ee60832814d9 SHA-256: 9448b46a7f92f51b83a73cb4452f9296617834ffab75384fd56966d6353d756a
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 0.9824

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/roblox-printables-free-game-hack PDF link annotation
    • https://dolphintour.vn/images/uploadsfiles/free-robux-just-click_GM431946152.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/roblox-naruto-final-bond-cheat-level-up_GM431946152.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/rbx-sites_GM431946152.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/coin-master-unlimited-spin-apk-free-download_GM406889139.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/roblox-meep-city-how-to-get-free-plus_GM431946152.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/minecraft-pe-hacked-client-download_GM479516143.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/roblox-old-avatar_GM431946152.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/oprewards-com-robux_GM431946152.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/robux-cheat-engine-no-survey_GM431946152.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/coin-master-hack-org_GM406889139.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/roblox-vehicle-tycoon-cheats_GM431946152.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/www-claim-gg-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/how-to-get-free-robux-apple-phone_GM431946152.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/roblox-treelands-hack_GM431946152.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/roblox-games-with-free-vip-servers_GM431946152.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/microsoft-roblox-rewards_GM431946152.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/easy-robux-today-com_GM431946152.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/coin-master-hack-apk-july-29_GM406889139.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/free-minecraft-servers-to-join_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.

FilenameKindSourceSize
font_00_sfnt_off00002ae6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2AE6 22588 bytes
SHA-256: 9a68699f58b8d81f619c59c613da5c68335ba7abc250b95a58649e40bf7f3565
font_01_sfnt_off00005d56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D56 19028 bytes
SHA-256: 5f2f594151e0b08153158ab3eb68c79847db9c0319a43ac7edef6c56c0cde280