Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fcb78486d69680e…

MALICIOUS

PDF

45.4 KB Created: 2021-06-03 07:51:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 87edaf29746dbe4b236dfb6ad54f9e6a SHA-1: 30fccc0ad24695e98a0b652b3545663dbd0d9af6 SHA-256: 3fcb78486d69680e86c4909057db77a708401940021283fabdb34b273fa23a45
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple embedded links that redirect to a known malicious infrastructure. The document body and heuristics indicate a lure for game-related cheats or items, designed to trick users into visiting the malicious URL. The primary malicious URL identified is https://netcdn.online/app/406889139/free-spin-link-for-coin-master-game-game-hack.

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/406889139/free-spin-link-for-coin-master-game-game-hack In PDF document text
    • http://pustaka.ust.ac.id/repository/where-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-to-get-minecraft-java-for-free_GM479516143.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-robux-link_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/toolbox-for-minecraft-ios_GM479516143.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-roblox-svg_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/coin-master-spin-hack-trick_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/plug-toolbox-for-minecraft-free-ios_GM479516143.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/hacks-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-do-you-get-free-food-on-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-download-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-roblox-gift-card_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/coin-master-hack-spins-apk-download_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/coin-master-free-2021-spin-link-today_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-to-earn-free-stars-on-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-to-get-free-coins-in-mcpe-master_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-minecraft-skins-girl_GM479516143.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/coin-master-free-redeem-code_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-spins-and-coins-coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-robux-no-generator_GM431946152.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
stream_004_off00004e09.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E09 24140 bytes
SHA-256: 000e3434abcfee9aab31443ecb9409415c3db14f571c8c127353d4b1ffe4d312
font_01_sfnt_off000084ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84EC 2840 bytes
SHA-256: 30dce2b9c1950da345d7fed8f00c38887adfa2f2ddecc31775af2315e819ac37
font_02_sfnt_off00008e9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E9F 18316 bytes
SHA-256: 4ad106dc66915d7a7c54c506e35e2e74cb7406920644c521a55874c4c44ea7c2

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