Malicious PDF — malware analysis report

Static analysis result for SHA-256 764f660ff0ef20c5…

MALICIOUS

PDF

45.1 KB Created: 2021-06-10 23:04:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-27
MD5: b7f40aa3974b79ccfc2b671448cba99e SHA-1: b1b2782496c5d3506c153e63c81ae11a1aa14b87 SHA-256: 764f660ff0ef20c5845ed1f12b974682e42e29d6b82a719775371d00635ba070
160 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.tw/app/431946152/roblox-hacker-2021-exe-download-game-hack In PDF document text
    • https://opac.itp.ac.id/repository/optifine-pe_GM479516143.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/minecraft-windows-10-free-code_GM479516143.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/hack-para-coin-master-singapore_GM406889139.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/free-robux-no-rewards_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/roblox-hack-apk_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/1x1x1x1-roblox-id_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/free-model-death-star-map-roblox_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/how-to-make-a-private-server-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/how-to-get-free-robux-without-downloading-apps-2021_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/roblox-script-hacks_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/how-to-hack-into-someones-roblox-account_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/coinmaster-free-spins-link_GM406889139.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/robuxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/rbxboost-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/free-bugatti-in-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/coin-master-free-spins-ios-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
stream_004_off00004f65.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F65 25748 bytes
SHA-256: 62c970e2eeeabbdd8cc277e4c6d1e1a590b816d0ead90706e5442d5b6be71068
font_01_sfnt_off00008b20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B20 19092 bytes
SHA-256: 446eb6ff92c7b02f3db3e1c303e005efb31f87f37a091f3d407abe7dbe227546

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