Malicious PDF — malware analysis report

Static analysis result for SHA-256 a736e7eb0e50a53f…

MALICIOUS

PDF

33.1 KB Created: 2021-06-22 15:37:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: bde4b8935f2a5b4bf254eef3bf3ef12d SHA-1: da9631d9e5f367a6ed7dd5cd7052e960532acca8 SHA-256: a736e7eb0e50a53f820ba58927999f765451789fb7eea702d3865d311521afaa
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a lure for game hacks and free currency, directing users to a URL associated with malicious redirector infrastructure. The ML classifier also flagged this PDF as malicious. The embedded URL is designed to trick users into clicking, likely leading to further malware or scams.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/roblox-free-hair-girl-game-hack In PDF document text
    • https://www.crackleybank.staffs.sch.uk/admin/ckfinder/userfiles/files/robuxglobalcom_GM431946152.pdfIn PDF document text
    • https://www.crackleybank.staffs.sch.uk/admin/ckfinder/userfiles/files/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • https://www.crackleybank.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • https://www.crackleybank.staffs.sch.uk/admin/ckfinder/userfiles/files/roblox-reversed-reality-hack_GM431946152.pdfIn PDF document text
    • https://www.crackleybank.staffs.sch.uk/admin/ckfinder/userfiles/files/free-robux-for-kids_GM431946152.pdfIn PDF document text
    • https://www.crackleybank.staffs.sch.uk/admin/ckfinder/userfiles/files/levvvel-coin-master_GM406889139.pdfIn PDF document text
    • https://www.crackleybank.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-free-spins-hack-download_GM406889139.pdfIn PDF document text
    • https://www.crackleybank.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-free-spins-link-today-new_GM406889139.pdfIn PDF document text
    • https://www.crackleybank.staffs.sch.uk/admin/ckfinder/userfiles/files/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.crackleybank.staffs.sch.uk/admin/ckfinder/userfiles/files/how-do-you-get-robux_GM431946152.pdfIn PDF document text
    • https://www.crackleybank.staffs.sch.uk/admin/ckfinder/userfiles/files/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.crackleybank.staffs.sch.uk/admin/ckfinder/userfiles/files/roblox-free-bundles_GM431946152.pdfIn PDF document text
    • https://www.crackleybank.staffs.sch.uk/admin/ckfinder/userfiles/files/how-to-get-more-robux-for-free_GM431946152.pdfIn PDF document text
    • https://www.crackleybank.staffs.sch.uk/admin/ckfinder/userfiles/files/robux-now_GM431946152.pdfIn PDF document text
    • https://www.crackleybank.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-spin-link-today_GM406889139.pdfIn PDF document text
    • https://www.crackleybank.staffs.sch.uk/admin/ckfinder/userfiles/files/how-to-earn-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • https://www.crackleybank.staffs.sch.uk/admin/ckfinder/userfiles/files/free-robux-accounts_GM431946152.pdfIn PDF document text
    • https://www.crackleybank.staffs.sch.uk/admin/ckfinder/userfiles/files/password-free-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://www.crackleybank.staffs.sch.uk/admin/ckfinder/userfiles/files/google-how-do-you-get-robux_GM431946152.pdfIn PDF document text
    • https://www.crackleybank.staffs.sch.uk/admin/ckfinder/userfiles/files/free-roblox-dominus_GM431946152.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
font_00_sfnt_off00002eb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EB3 21320 bytes
SHA-256: 4079530fdcb9385c399fc651e501445d4b1b73e535e036f5fa78defe65e6a440
font_01_sfnt_off00005d2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D2C 18768 bytes
SHA-256: 152b03728ddecf30a4d8275c62085ff040828e8cf06d0f5097c5d769c49d0b50

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