Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c8c4aeb5dceb1da…

MALICIOUS

PDF

43.3 KB Created: 2021-05-12 03:12:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 0226f00122bc70f3d5d404b75b829c1f SHA-1: 6b6cfde351b1fc02412b3ff94059ff95c75ab797 SHA-256: 4c8c4aeb5dceb1da4d1144f6c0ab98869692c4c64cf98d06c53cd091c51cb779
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to malicious redirectors and websites offering game hacks and currency generators, indicating a lure-based attack. The ML classifier strongly flagged this PDF as malicious. The embedded URLs are designed to lead users to potentially harmful content, likely as part of a phishing or malware distribution scheme.

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-spins-game-hack In PDF document text
    • http://alazhar-university.ac.id/aplikasi/perpustakaan/repository/free-robux-easy_GM431946152.pdfIn PDF document text
    • http://alazhar-university.ac.id/aplikasi/perpustakaan/repository/coin-master-hacks-xyz_GM406889139.pdfIn PDF document text
    • http://alazhar-university.ac.id/aplikasi/perpustakaan/repository/coin-master-pro-hack_GM406889139.pdfIn PDF document text
    • http://alazhar-university.ac.id/aplikasi/perpustakaan/repository/blox-pink-robux-free_GM431946152.pdfIn PDF document text
    • http://alazhar-university.ac.id/aplikasi/perpustakaan/repository/minecraft-free-download-mac-full-version_GM479516143.pdfIn PDF document text
    • http://alazhar-university.ac.id/aplikasi/perpustakaan/repository/get-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://alazhar-university.ac.id/aplikasi/perpustakaan/repository/best-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://alazhar-university.ac.id/aplikasi/perpustakaan/repository/coin-master-unlimited-spin-link_GM406889139.pdfIn PDF document text
    • http://alazhar-university.ac.id/aplikasi/perpustakaan/repository/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
    • http://alazhar-university.ac.id/aplikasi/perpustakaan/repository/easy-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://alazhar-university.ac.id/aplikasi/perpustakaan/repository/spin-coin-master-free_GM406889139.pdfIn PDF document text
    • http://alazhar-university.ac.id/aplikasi/perpustakaan/repository/coin-master-free-link-2021_GM406889139.pdfIn PDF document text
    • http://alazhar-university.ac.id/aplikasi/perpustakaan/repository/roblox-piano-hack_GM431946152.pdfIn PDF document text
    • http://alazhar-university.ac.id/aplikasi/perpustakaan/repository/coin-master-free-spins-and-coins-daily_GM406889139.pdfIn PDF document text
    • http://alazhar-university.ac.id/aplikasi/perpustakaan/repository/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://alazhar-university.ac.id/aplikasi/perpustakaan/repository/how-to-duplicate-coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://alazhar-university.ac.id/aplikasi/perpustakaan/repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://alazhar-university.ac.id/aplikasi/perpustakaan/repository/best-site-for-free-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://alazhar-university.ac.id/aplikasi/perpustakaan/repository/minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://alazhar-university.ac.id/aplikasi/perpustakaan/repository/is-coin-master-hack-safe_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_off000049b3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49B3 29852 bytes
SHA-256: de19c9690bec1750a7425bb1b900f76efe0444ea904029ea95ae7a43ddf8893b
font_01_sfnt_off0000886d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x886D 17724 bytes
SHA-256: 9e6e11cb276c7dd66a19f48669c6f0c9fad7b2850a2ee7a5573e48fd717a5b28

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