Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0fde4f76059dea2…

MALICIOUS

PDF

34.2 KB Created: 2021-07-04 01:23:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 14820b78beb6e20e4a89cc11da7f5c42 SHA-1: a60b38ef1c308dc364dbdd7d05aea3cf5f99ab4a SHA-256: a0fde4f76059dea2f0449fc337be665950adb3022f1345b6b0f152426f92d005
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of 'free Robux' or game hacks to trick users into clicking a link. The primary link, http://netcdn.tw/app/431946152/free-robux-pastebin-game-hack, is identified as a redirector to potentially malicious content. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to lead the user to a compromised site or download further malware.

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/431946152/free-robux-pastebin-game-hack PDF link annotation
    • https://c2o-library.net/catalog/repository/free-coins-and-spins-link-for-coin-master_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/coin-master-32-android-mod-hack-apk-download_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-get-free-robux-easy-on-phone_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/can-you-host-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-robux-stream_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/robux-websites-that-work_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-fire-tik-tok_GM835599320.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/minecraft-mod-menu-apk_GM479516143.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/fly-hack-for-roblox-booga-booga_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-hack-a-roblox-account-2021-on-ipad_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/roblox-when-will-counter-blox-remastered-be-free_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/hack-robux-ohne-cheat-engine_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-shields-coin-master_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-2021-robux-promo-code_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/hacking-roblox-account-script_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/try-minecraft-free_GM479516143.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-robux-2021_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/roblox-free-gift-cards-2021_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/roblox-free-shirts-2021_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-get-infinite-robux-on-roblox-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_off00002ffd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FFD 21936 bytes
SHA-256: 5c677e01045de0fb2d4f8ae6f6e5a1721e5c7c84d8aa480ee623089f0a59bcf5
font_01_sfnt_off0000605c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x605C 19092 bytes
SHA-256: 5bfd890d84b0c14d72a786ae590b650f833002b15fe449ee91ced07c3ea68d33

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