Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5d4686e635f0eea…

MALICIOUS

PDF

36.2 KB Created: 2021-06-18 04:50:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-28
MD5: 38fb3992cfc48dcf77d2e01a7825ec49 SHA-1: 9fd4ecd3626d0c0eacef559b6afeb78c8b8a964f SHA-256: c5d4686e635f0eea63d25cff4246789f65e135d85ec2a7580cfd2353854455a9
160 Risk Score

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/free-account-roblox-with-robux-game-hack In PDF document text
    • https://perpustakaan.itda.ac.id/repository/roblox-powering-imagination-free-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/mcmaster-club-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/daily-free-spin-coin-master-link_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/veil-hack-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/mythical-chaos-robux-hack-v3-0_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/how-to-get-hacks-on-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-roblox-wings_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/lazy-blocks-com-free-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-tiktok-followers-without-survey_GM835599320.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/coin-master-hack-to-get-free-spins_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/coin-master-hack-ios_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/rewardex-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/links-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/roblox-adopt-me-free_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/how-to-get-robux-easy_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/roblox-cheat-engine-hacks-download_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/coin-master-free-spins-and-coins-group_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_off0000337e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x337E 23112 bytes
SHA-256: f47e53cbe6b6cf5d49b38feec382aef3ed6fc872fb0c243e5917cea8979ace20
font_01_sfnt_off00006786.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6786 19376 bytes
SHA-256: aca93b4e3f604d5c7fb305f64f27e26b52b7bc87275afcbcda3d4758617aefe4

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