Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a4711e4d0196a87…

MALICIOUS

PDF

45.8 KB Created: 2021-06-04 04:11:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 03218458f31f154a1205b6a5b714decf SHA-1: 2d7250a5b6fc6ba0e92c6ef949501a43cecd4c7b SHA-256: 8a4711e4d0196a87020d27d99352fd0d5ff9266482c1e9741b6ed489aeec11f7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for a "free generator / game hack" which redirects to malicious infrastructure. The embedded URL `https://netcdn.online/app/431946152/free-clothing-on-roblox-game-hack` is identified as a known malicious redirector. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest a malicious redirection workflow designed to trick users into visiting potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9797

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.online/app/431946152/free-clothing-on-roblox-game-hack In PDF document text
    • http://library.yamasi.ac.id/repository/how-to-get-minecraft-for-free-on-your-phone_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coinmaster-rewards_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/free-game-pack-with-google-play-coin-master_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/minecraft-net-download-free_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-hacks-for-iphone_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/daily-coin-master-free-spin-link-facebook_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/ways-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-free-spins-hack-link_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coinmaster-fan-page_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/pubg-uc-cheap-price_GM1330123889.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/level-coin_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-apk-hack_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/facebook-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/roblox-hack-com_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/robux-today_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-unlimited-spin-hack_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-free-spin-link-twitter_GM406889139.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_off00004e1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E1F 24184 bytes
SHA-256: ab43eee87f0f77943cd2b1eff7af5aedca0344d1348a2282341cf80536591d15
font_01_sfnt_off00008534.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8534 2940 bytes
SHA-256: ae8acc7f13e86db3aed98d7dfb73e70e16f4dedb45e9f0467460b76f54e1a1bb
font_02_sfnt_off00008f43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F43 18624 bytes
SHA-256: c8648e0e7fa589189c517af6ddfacdde337cbe9d54a122799786c2e236ce5a9b

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