Malicious PDF — malware analysis report

Static analysis result for SHA-256 4457ed05c9c9565c…

MALICIOUS

PDF

47.0 KB Created: 2021-05-17 08:19:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-11
MD5: 3160c065a74b4840c2a8074dd1dfaaa9 SHA-1: 1ddbb8324d7141e46feda8334b26410c249467a3 SHA-256: 4457ed05c9c9565cc091cb16d525c04b731f144e0da755b4b90d957f79f2768d
160 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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/431946152/free-robux-generator-for-roblox-2021-game-hack In PDF document text
    • http://dermatologos-thessaloniki.gr/images/free-spin-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://dermatologos-thessaloniki.gr/images/master-8-ball-pool-free-coins_GM406889139.pdfIn PDF document text
    • http://dermatologos-thessaloniki.gr/images/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • http://dermatologos-thessaloniki.gr/images/coin-master-spin-hack-app_GM406889139.pdfIn PDF document text
    • http://dermatologos-thessaloniki.gr/images/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
    • http://dermatologos-thessaloniki.gr/images/hack-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://dermatologos-thessaloniki.gr/images/coin-master-unlimited-spins_GM406889139.pdfIn PDF document text
    • http://dermatologos-thessaloniki.gr/images/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • http://dermatologos-thessaloniki.gr/images/links-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://dermatologos-thessaloniki.gr/images/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://dermatologos-thessaloniki.gr/images/can-you-give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://dermatologos-thessaloniki.gr/images/robux-gainer_GM431946152.pdfIn PDF document text
    • http://dermatologos-thessaloniki.gr/images/how-to-get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://dermatologos-thessaloniki.gr/images/real-roblox_GM431946152.pdfIn PDF document text
    • http://dermatologos-thessaloniki.gr/images/hack-coin-master-no-survey_GM406889139.pdfIn PDF document text
    • http://dermatologos-thessaloniki.gr/images/20-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://dermatologos-thessaloniki.gr/images/how-to-hack-mcpe-master-coins_GM406889139.pdfIn PDF document text
    • http://dermatologos-thessaloniki.gr/images/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • http://dermatologos-thessaloniki.gr/images/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • http://dermatologos-thessaloniki.gr/images/how-to-get-free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a71.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A71 27344 bytes
SHA-256: c8d26139d7ae2de4ac5da484d37709e67bbc3ecf87d01b9c058915b8ce6460c1
font_01_sfnt_off000089e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89E8 2844 bytes
SHA-256: baad2f3f6808f4af03fa9398e38c580c8d846f7f773a947d8cc1f39b2753d31a
font_02_sfnt_off000093a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93A9 18820 bytes
SHA-256: ebe9c90542e8fe2fea15c90130dc88571bff9717049b6ef0e566bae53a322baf