Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d4212e2ac5cde9a…

MALICIOUS

PDF

34.8 KB Created: 2021-07-05 22:33:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 9efb8ae675537244708a6cb567cdd7bc SHA-1: c8132c7a3eb1d00ff26692f264c90a7e75a3a4c4 SHA-256: 9d4212e2ac5cde9ad061cb1653eb45c06278162a30d055ddced1eaf6936b7a8d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to a known malicious redirector, masquerading as a 'free generator / game hack' lure. The document body explicitly mentions 'Coin Master 20 Free Spins Link Today' and includes the malicious URL. This indicates a phishing or scam attempt designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/coin-master-20-free-spins-link-today-game-hack In PDF document text
    • http://fishboat.hr/files/growbux-net-free-robux_GM431946152.pdfIn PDF document text
    • https://www.fishboat.hr/files/free-400-spins-coins-master_GM406889139.pdfIn PDF document text
    • http://fishboat.hr/files/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
    • https://www.fishboat.hr/files/hack-coin-master-apk-mod_GM406889139.pdfIn PDF document text
    • https://www.fishboat.hr/files/free-roblox-adopt-me-accounts_GM431946152.pdfIn PDF document text
    • http://fishboat.hr/files/no-scam-free-robux_GM431946152.pdfIn PDF document text
    • https://www.fishboat.hr/files/free-roblox-giftcards-not-used-100-80_GM431946152.pdfIn PDF document text
    • https://www.fishboat.hr/files/roblox-instant-kill-hack_GM431946152.pdfIn PDF document text
    • http://fishboat.hr/files/minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • http://fishboat.hr/files/coin-master-daily-free-spins-25_GM406889139.pdfIn PDF document text
    • http://fishboat.hr/files/minecraft-free-download-windows_GM479516143.pdfIn PDF document text
    • https://www.fishboat.hr/files/android-coin-master-3433-apk-hack_GM406889139.pdfIn PDF document text
    • http://fishboat.hr/files/minecraft-for-laptop-free_GM479516143.pdfIn PDF document text
    • http://fishboat.hr/files/114-hacks_GM479516143.pdfIn PDF document text
    • http://fishboat.hr/files/free-robux-no-human-verification-no-download-no-survey-2021_GM431946152.pdfIn PDF document text
    • http://fishboat.hr/files/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://fishboat.hr/files/install-coin-master_GM406889139.pdfIn PDF document text
    • http://fishboat.hr/files/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://fishboat.hr/files/roblox-t-shirt-free_GM431946152.pdfIn PDF document text
    • http://fishboat.hr/files/robloxmatchcom-free-robux_GM431946152.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
font_00_sfnt_off00002fc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FC8 22896 bytes
SHA-256: c97e4256e318e2314efd111357ce1eabe38e64ccc57640ba2583282c86b1a6ab
font_01_sfnt_off0000632e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x632E 18992 bytes
SHA-256: 0f16f6f05544a8482aa3305e7e753d03ef12058668236921500c43b65501b7a4

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