Malicious PDF — malware analysis report

Static analysis result for SHA-256 320cf213f9b98b17…

MALICIOUS

PDF

34.9 KB Created: 2021-06-27 06:26:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 9511346b1f27a3eb75f24c0425209823 SHA-1: 66b14fafbabbf12fd77870bc1b1569ed4d8dfb46 SHA-256: 320cf213f9b98b172cc7bd7c8b05c043cd8e8a9f6519c8159decc608c65995f3
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for game hacks and free items, directing users to the URL http://netcdn.co/app/431946152/free-adopt-me-flying-potion-roblox-codes-game-hack. This URL likely leads to a malicious site designed to exploit user interest in free in-game currency or items. The ML classifier also flagged this PDF as malicious with high confidence.

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/free-adopt-me-flying-potion-roblox-codes-game-hack PDF link annotation
    • https://foc.vn/public/upload/files/roblox-adopt-me-free-pets_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/embox-roblox-hack_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/how-to-get-100-robux-for-free_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/free-roblox-accounts-with-robux-that-work-2021-november_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/blogspot-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://foc.vn/public/upload/files/moon-active_GM406889139.pdfIn PDF document text
    • https://foc.vn/public/upload/files/free-robux-site_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/como-conseguir-robux-gratis-sin-hacks-2021_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/coin-master-free-spins-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • https://foc.vn/public/upload/files/roblox-free-vip-server_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/minecraft-hack-download_GM479516143.pdfIn PDF document text
    • https://foc.vn/public/upload/files/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/free-clothing-apps-in-roblox_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/coin-master-free-spins-and-coins-today_GM406889139.pdfIn PDF document text
    • https://foc.vn/public/upload/files/roblox-free-body_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/can-pokemon-go-free-coins_GM1094591345.pdfIn PDF document text
    • https://foc.vn/public/upload/files/actual-free-robux_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/free-minecraft-capes-no-mods_GM479516143.pdfIn PDF document text
    • https://foc.vn/public/upload/files/how-to-get-free-hats-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/robux-free-gift-card-org-hack_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.

FilenameKindSourceSize
font_00_sfnt_off00002f93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F93 22304 bytes
SHA-256: 81e45117df0015300cf997b1eb1eede5aa2c12899ea95697d43a05b2473a9f46
font_01_sfnt_off0000617c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x617C 19752 bytes
SHA-256: ca2be9430c0bda3a8a95ead9799a80e0b39a4c9b95a963f39369672b8ce0d47c

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