Malicious PDF — malware analysis report

Static analysis result for SHA-256 51e27b4d2cf023a0…

MALICIOUS

PDF

35.1 KB Created: 2021-06-28 17:43:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: ee05bfa2cdbf6a88ac98b849c7a945eb SHA-1: 6d38c6da8e160368e76234f6c2e89857eec1f15d SHA-256: 51e27b4d2cf023a0256109bb6c93ee9398e474ad5209c454604d34c7503c5c19
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to malicious infrastructure, masquerading as game hacks for popular titles like Roblox. The primary link, http://netcdn.co/app/431946152/speed-hacks-for-roblox-jailbreak-game-hack, is identified as a malicious redirector. The document's content and embedded links strongly suggest a phishing or scam attempt to lure 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.co/app/431946152/speed-hacks-for-roblox-jailbreak-game-hack In PDF document text
    • https://pustaka.widyakartika.ac.id/repository/minecraft-pe-hacks_GM479516143.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/minecraft-free-download-unblocked_GM479516143.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/how-to-have-free-clothes-on-roblox-2021-no-bc_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/how-to-make-a-group-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/how-to-download-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/how-to-hack-coin-master-game_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/ac-market-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/robux-prices_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/roblox-game-hack-robux_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-robux-videos-recent_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/minecraft-esp_GM479516143.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coin-master-hack-mod-apk-unlimited-spins_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/tiktok-free-app_GM835599320.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-robux-no-email_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/robux-hack-dll_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-roblox-hats-promo-code-wiki_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/www-roblox-hack_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-vine-crown-for-roblox_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coin-master-70-spin-link-2021_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
font_00_sfnt_off00003069.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3069 22640 bytes
SHA-256: ee96201ee90e189b91eaa3780a8c02d8bef02b72ac98abed73d6a0b7e4d3d1f5
font_01_sfnt_off00006339.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6339 19456 bytes
SHA-256: 37a4b0f3e10fdbcb534a30e663d44d8fb6e607cc8a4e4a0c44bff4541594f2a8

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