Malicious PDF — malware analysis report

Static analysis result for SHA-256 97b1694b11f130b0…

MALICIOUS

PDF

49.1 KB Created: 2021-06-09 08:52:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 33c2e1ea44a30ecb3615ac6e4d99d841 SHA-1: 91cef2d108515fed752e60feaa49bc83ba929def SHA-256: 97b1694b11f130b0f7bafff5ef7522237379cc2df407056809ab5b7dd8ef3dc3
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document presents a fake CAPTCHA or human verification prompt to lure the user into clicking a link. This link, 'https://netcdn.tw/app/431946152/roblox-how-to-hack-a-person-game-hack', redirects to malicious infrastructure. The document's content and the embedded URLs suggest a phishing or scam attempt, likely designed to lead users to sites that may host further malware or attempt credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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
  • 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 https://netcdn.tw/app/431946152/roblox-how-to-hack-a-person-game-hack In PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/boost9-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/coin-master-free-spins-1701-20_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/coin-master-free-spins-hack-2021_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/robux-without-verification_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/minecraft-windows-10-edition-hacks_GM479516143.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/minecraft-java-edition-key-free_GM479516143.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/earn-free-robux-today_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/coin-master-free-spin-daily-link_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/instant-robux_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/robux-hack-me_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/game-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/robux-download_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/install-free-game-coin-master_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/get-free-robux-info_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/free-robux-obby-roblox-game_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/free-robux-app_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004f85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F85 29500 bytes
SHA-256: fd1d599cf14fd46a0d8fd0493a14b65281f3469fda472685c4b11cfecc355790
font_01_sfnt_off00009290.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9290 2880 bytes
SHA-256: 8e94a3e6d0b915631333312aaa51ae05a0eeba0704f4e9e40d86aec9d096645c
font_02_sfnt_off00009c82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C82 18500 bytes
SHA-256: edda1cda8560b52700704994978345917a007d39848e117eb9c9b2bc54ee6126

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