Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd75a81ac818b9fc…

MALICIOUS

PDF

34.9 KB Created: 2021-07-09 02:31:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-18
MD5: 998a9b81b0c5defd19233b2c50002d10 SHA-1: 534a8bc054bba464bfd0795e8e3344506d4722ee SHA-256: cd75a81ac818b9fc0243760c10f6d5e3dd4e2392008e8bc947d1299ffb418a7f
220 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.tw/app/431946152/free-roblox-hack-game-hack In PDF document text
    • https://www.elearning.man2banjar.com/__statics/gudangsoal/files/coin-master-daily-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • https://www.elearning.man2banjar.com/__statics/gudangsoal/files/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • https://www.elearning.man2banjar.com/__statics/gudangsoal/files/how-to-get-free-turbo-builders-club-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.elearning.man2banjar.com/__statics/gudangsoal/files/coin-master-free-spins-link-blogspot-2021_GM406889139.pdfIn PDF document text
    • https://www.elearning.man2banjar.com/__statics/gudangsoal/files/coin-master-free-spins-for-iphone_GM406889139.pdfIn PDF document text
    • https://www.elearning.man2banjar.com/__statics/gudangsoal/files/free-robux-earn_GM431946152.pdfIn PDF document text
    • https://www.elearning.man2banjar.com/__statics/gudangsoal/files/how-to-get-free-robux-on-chromebook_GM431946152.pdfIn PDF document text
    • https://www.elearning.man2banjar.com/__statics/gudangsoal/files/lazy-blocks-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.elearning.man2banjar.com/__statics/gudangsoal/files/how-to-get-free-robux-youtube_GM431946152.pdfIn PDF document text
    • https://www.elearning.man2banjar.com/__statics/gudangsoal/files/coin-master-free-spins-link-today-instagram_GM406889139.pdfIn PDF document text
    • https://www.elearning.man2banjar.com/__statics/gudangsoal/files/coin-master-hack-2021-free_GM406889139.pdfIn PDF document text
    • https://www.elearning.man2banjar.com/__statics/gudangsoal/files/robux-earner_GM431946152.pdfIn PDF document text
    • https://www.elearning.man2banjar.com/__statics/gudangsoal/files/free-robux-on-phone_GM431946152.pdfIn PDF document text
    • https://www.elearning.man2banjar.com/__statics/gudangsoal/files/free-robux-safe_GM431946152.pdfIn PDF document text
    • https://www.elearning.man2banjar.com/__statics/gudangsoal/files/gamehunters-club-coin-master_GM406889139.pdfIn PDF document text
    • https://www.elearning.man2banjar.com/__statics/gudangsoal/files/coin-master-card-hack_GM406889139.pdfIn PDF document text
    • https://www.elearning.man2banjar.com/__statics/gudangsoal/files/get-me-robux-for-free_GM431946152.pdfIn PDF document text
    • https://www.elearning.man2banjar.com/__statics/gudangsoal/files/free-robux-codes-not-clickbait_GM431946152.pdfIn PDF document text
    • https://www.elearning.man2banjar.com/__statics/gudangsoal/files/free-robux-boost_GM431946152.pdfIn PDF document text
    • https://www.elearning.man2banjar.com/__statics/gudangsoal/files/free-spins-from-coin-master_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_off0000311e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x311E 22824 bytes
SHA-256: a3d1e86b2eb53d867694ebce3c2e6b047a98d802d18d97b34509fecde0c9b64b
font_01_sfnt_off0000642d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x642D 18820 bytes
SHA-256: cf67562a6930539490549aeb8f0b318a0b45b3e5cb7414ef3283f960707338b6

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