Malicious PDF — malware analysis report

Static analysis result for SHA-256 2299cb7f4591bda2…

MALICIOUS

PDF

33.1 KB Created: 2021-07-03 20:48:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 9858735caddc91a2895a858179a8cdc9 SHA-1: 0be2592b6d3e8e1540c99bc10a16847338e7a785 SHA-256: 2299cb7f4591bda2c0682090624a56249a84e739bee6107fb4f0819a13f2c43b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and lures users with promises of free game hacks and in-game currency. The primary redirector URL is http://netcdn.tw/app/479516143/minecraft-education-free-game-hack, which likely serves as a gateway to further malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the observed redirection and lure techniques.

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/479516143/minecraft-education-free-game-hack In PDF document text
    • http://librarysenior.com/repository/spin-free-coin-master_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/roblox-jailbreak-how-to-get-vip-for-free_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/how-to-win-free-robux_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/free-tiktok-likes-and-views_GM835599320.pdfIn PDF document text
    • http://librarysenior.com//repository/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/free-roblox-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/coin-master-hack-tool-pc_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/how-do-we-get-free-robux_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/coin-master-root-hack_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/free-spins-for-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/free-roblox-vip-login_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/free-roblox-premium_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/getrobux-ninja_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/pubg-uc-alma_GM1330123889.pdfIn PDF document text
    • http://librarysenior.com//repository/free-chest-coin-master_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/can-you-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://librarysenior.com/repository/coin-master-free-download-pc_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/free-minecraft-com_GM479516143.pdfIn PDF document text
    • http://librarysenior.com/repository/give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/delta-hack-roblox_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_off00002e3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E3F 21968 bytes
SHA-256: 7a9108e1ddd25f912ffb028ec14394ae93c7e797bccd5786037cc07eaab54469
font_01_sfnt_off00005eac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EAC 18312 bytes
SHA-256: 08598633ecdc94b382a4e335ccefc5a7b6d358a9bcaaad09a03ae0d079369349

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