Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b1f46e212b20acc…

MALICIOUS

PDF

44.0 KB Created: 2021-05-17 14:13:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a3697acaad839820acbbb8f8ecc78aa4 SHA-1: 440363dce17577bfc9005602f60f79f6bcd4ab79 SHA-256: 8b1f46e212b20acc714ccd56f77cce3c3443fbb0081a3ba112a47c8985b0d04f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites that offer "hacks" or "generators" for popular games, masquerading as a lure for free in-game currency or cheats. The primary link, https://netcdn.xyz/app/406889139/coin-master-hack-download-ios-game-hack, is flagged as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a social engineering attack aimed at tricking users into downloading potentially malicious files or visiting scam websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 4

  • 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.
  • 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.xyz/app/406889139/coin-master-hack-download-ios-game-hack In PDF document text
    • http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/free-coin-master-stuff_GM406889139.pdfIn PDF document text
    • http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/coin-master-ultra-attack-hack_GM406889139.pdfIn PDF document text
    • http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/free-robux-sites-that-work_GM431946152.pdfIn PDF document text
    • http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/free-robux-websites-2021_GM431946152.pdfIn PDF document text
    • http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/minecraft-cheat-client_GM479516143.pdfIn PDF document text
    • http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/free-robux-today_GM431946152.pdfIn PDF document text
    • http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/coin-master-daily-free-coins-link-today_GM406889139.pdfIn PDF document text
    • http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/how-to-hack-in-roblox-prison-life_GM431946152.pdfIn PDF document text
    • http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/you-promised-my-son-free-robux_GM431946152.pdfIn PDF document text
    • http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/free-robux-apps-that-work_GM431946152.pdfIn PDF document text
    • http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/coin-master-hack-apk-free-download_GM406889139.pdfIn PDF document text
    • http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/free-robux-no-verification-no-download_GM431946152.pdfIn PDF document text
    • http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/static-moonactive-net-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/robux-free-promo-codes_GM431946152.pdfIn PDF document text
    • http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/coin-master-free-spins-link-iphone_GM406889139.pdfIn PDF document text
    • http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/100-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/how-to-get-free-gold-cards-on-coin-master_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_003_off00004c01.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C01 29748 bytes
SHA-256: cedb206cf959634f410de5e1732e5ebd819b98e2e9f2e8ba49828bfc5575fbe7
font_01_sfnt_off000089ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89AE 18296 bytes
SHA-256: eb74dfbf061b28f56530c4f3611099698c9338eeb1cc06642e5044c6dd5fa24e