Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5d5d6bfedb10407…

MALICIOUS

PDF

42.5 KB Created: 2021-05-18 23:43:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-28
MD5: 440f068b33d4d78d9c3c29ec5fea7793 SHA-1: f8c754eaf5527bbb8c46d0f49c73c2f011604e5b SHA-256: c5d5d6bfedb1040782f7687924e5831dc803e52c048221232781022c06e55eb7
160 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/406889139/coin-master-free-spins-apple-game-hack In PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/games-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/free-private-minecraft-server_GM479516143.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/minecraft-online-free-no-download_GM479516143.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/coin-master-free-spins-hack-2021_GM406889139.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/robuxmatchcon_GM431946152.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/minecraft-pe-hacks-2021_GM479516143.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/free-spin-hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/coin-master-level-4_GM406889139.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/coin-master-daily-free-spins-link-march-2021_GM406889139.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/descargar-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/coin-master-hack-spins-game-download_GM406889139.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/websites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/real-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/roblox-hack_GM431946152.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/hack-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/real-free-robux-codes_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
stream_003_off00004b4d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B4D 25472 bytes
SHA-256: edb359509b9cb1e30e7932d464a632521f0b22212f1605103dcba3741d2f993f
font_01_sfnt_off000084f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84F1 17960 bytes
SHA-256: b36d82a69cb85e4c678515c56ecb428cbe565fcb1c36aa2c67d2b595c698cd3f