Malicious PDF — malware analysis report

Static analysis result for SHA-256 624aaf1a373be876…

MALICIOUS

PDF

44.4 KB Created: 2021-06-03 07:45:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-05-29
MD5: ea3150b02eacde98f77b3188446e9e73 SHA-1: bf6f4ac601091792a44cec51f2fa80f12b3c0492 SHA-256: 624aaf1a373be8766a7d91321ad89d3d2cdcdf40e9e22fe7f13cf88e21f7e4ad
220 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.online/app/406889139/coin-master-free-spins-and-coins-daily-game-hack In PDF document text
    • http://jbtlive.com/assets/CKImages/files/free-coins-and-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://jbtlive.com/assets/CKImages/files/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://jbtlive.com/assets/CKImages/files/can-i-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://jbtlive.com/assets/CKImages/files/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://jbtlive.com/assets/CKImages/files/how-to-get-free-pet-food-in-coin-master_GM406889139.pdfIn PDF document text
    • http://jbtlive.com/assets/CKImages/files/robux-free-online_GM431946152.pdfIn PDF document text
    • http://jbtlive.com/assets/CKImages/files/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://jbtlive.com/assets/CKImages/files/free-coin-master-spins-daily_GM406889139.pdfIn PDF document text
    • http://jbtlive.com/assets/CKImages/files/coin-master-daily-link_GM406889139.pdfIn PDF document text
    • http://jbtlive.com/assets/CKImages/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://jbtlive.com/assets/CKImages/files/free-roblox-hair-to-wear_GM431946152.pdfIn PDF document text
    • http://jbtlive.com/assets/CKImages/files/free-roblox-shirts-templates_GM431946152.pdfIn PDF document text
    • http://jbtlive.com/assets/CKImages/files/free-spin-coin-master-link-download_GM406889139.pdfIn PDF document text
    • http://jbtlive.com/assets/CKImages/files/how-to-hack-roblox-on-mobile_GM431946152.pdfIn PDF document text
    • http://jbtlive.com/assets/CKImages/files/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://jbtlive.com/assets/CKImages/files/robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://jbtlive.com/assets/CKImages/files/coin-master-hacks-no-verification_GM406889139.pdfIn PDF document text
    • http://jbtlive.com/assets/CKImages/files/minecraft-free-games-no-download_GM479516143.pdfIn PDF document text
    • http://jbtlive.com/assets/CKImages/files/robux-gainer_GM431946152.pdfIn PDF document text
    • http://jbtlive.com/assets/CKImages/files/link-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000528e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x528E 24376 bytes
SHA-256: 2d8b2fe3c77cafe7f61898db05f865328273c9b5aa73e2287efdd70797fd5410
font_01_sfnt_off00008a68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A68 18480 bytes
SHA-256: e9052e0f9c593188345ba389179451ef12c6c6a401d56a628cce0964dfd3917c

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