Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b61626a9e1ef4c0…

MALICIOUS

PDF

45.6 KB Created: 2021-06-03 08:15:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-17
MD5: 5e52ed00e9f668aa84e84f92204d36d4 SHA-1: f921158d76529d8bd5f137418aa45b397b2e4f17 SHA-256: 2b61626a9e1ef4c0de92f0293d3708cd967cc900b3b0989374b820bfb57e079e
160 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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/479516143/minecraft-maps-pe-free-download-game-hack In PDF document text
    • https://www.knjiznica-oroslavje.hr/files/actual-free-robux_GM431946152.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/coin-master-apk-hack-mod-download_GM406889139.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/heroes-online-roblox_GM431946152.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/roblox-com-r_GM431946152.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/free-roblox-usernames-and-passwords_GM431946152.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/roblox-re_GM431946152.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/easy-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/how-can-i-get-free-coinsn-coin-master_GM406889139.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/free-robux-no-human-verification-and-no-survey_GM431946152.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/classic-minecraft-net-hacks_GM479516143.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/ways-hacks-robux_GM431946152.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/coin-master-free-spins-activegamer_GM406889139.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/free-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/coin-master-ids-for-free-spins_GM406889139.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/minecraft-hacks-pc_GM479516143.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • https://sigmaclient.info#2In PDF document text
    • https://flux.today#3In 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_off00005520.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5520 25304 bytes
SHA-256: 16cc111132ac5cf782498e3a701fbddee8297afe2092b6b592ad45facfb6ea2e
font_01_sfnt_off00008eff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EFF 18620 bytes
SHA-256: 0821b230906a16eab24876bc900cf5b44140eb476c0c2d68670d368f294fcdb9

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