Malicious PDF — malware analysis report

Static analysis result for SHA-256 9418994cef98a748…

MALICIOUS

PDF

44.2 KB Created: 2021-06-07 11:50:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-12
MD5: 84b16373f91d07abf40f865aff4e3b48 SHA-1: 7070da910339be949997197c10eec3cecec28262 SHA-256: 9418994cef98a7485b60bb9ffb079170554a58248207dce761f304512406fc28
200 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/scaciati-mega-cheat-roblox-2021-game-hack In PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/coin-master-coins_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/daily-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/roblox-hack-site_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/roblox-hacked-face-id_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/appsmob-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/free-robux-generator-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/free-spins-coin-master-ios-links_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/free-spins-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/free-coin-master-game_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/roblox-cheats-to-get-2021-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/unlimited-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/coin-master-free-spins-link-2021-no-verification-deutsch_GM406889139.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
stream_004_off00004e56.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E56 24664 bytes
SHA-256: 1829410582ee90df4503e2dd3208e8cf78c41f38b989d6d5af78b6e2687b1d9e
font_01_sfnt_off000086f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86F6 19288 bytes
SHA-256: 8550293dfe57b621f8bf34d1d9a261fc58e2c2eca11da22e7696e2fcf0f16f26

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