Malicious PDF — malware analysis report

Static analysis result for SHA-256 437ac1ca3a782857…

MALICIOUS

PDF

35.5 KB Created: 2021-06-20 12:41:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 1a65828066cd2b72cfa72d9989e07621 SHA-1: 6a681c53f9348821320fdc3abaffa7eb502121e2 SHA-256: 437ac1ca3a782857c3f9dc3670f105911c5c89010fc374164713a0c8732626ca
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that lead to a known malicious redirector, disguised as a 'free generator' or 'game hack' lure. The document body and heuristics indicate a clear intent to trick users into visiting these malicious sites, likely to download further malware or engage in credential harvesting. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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/free-robux-websites-that-actually-work-2021-game-hack In PDF document text
    • https://www.albrighteducationcentre.co.uk/admin/ckfinder/userfiles/files/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • https://www.albrighteducationcentre.co.uk/admin/ckfinder/userfiles/files/get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://www.albrighteducationcentre.co.uk/admin/ckfinder/userfiles/files/how-to-get-free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • https://www.albrighteducationcentre.co.uk/admin/ckfinder/userfiles/files/no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.albrighteducationcentre.co.uk/admin/ckfinder/userfiles/files/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • https://www.albrighteducationcentre.co.uk/admin/ckfinder/userfiles/files/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://www.albrighteducationcentre.co.uk/admin/ckfinder/userfiles/files/how-to-hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • https://www.albrighteducationcentre.co.uk/admin/ckfinder/userfiles/files/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • https://www.albrighteducationcentre.co.uk/admin/ckfinder/userfiles/files/how-to-get-free-outfits-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.albrighteducationcentre.co.uk/admin/ckfinder/userfiles/files/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.albrighteducationcentre.co.uk/admin/ckfinder/userfiles/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.albrighteducationcentre.co.uk/admin/ckfinder/userfiles/files/pokemon-go-free-quagsire_GM1094591345.pdfIn PDF document text
    • https://www.albrighteducationcentre.co.uk/admin/ckfinder/userfiles/files/roblox-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.albrighteducationcentre.co.uk/admin/ckfinder/userfiles/files/free-draw-roblox_GM431946152.pdfIn PDF document text
    • https://www.albrighteducationcentre.co.uk/admin/ckfinder/userfiles/files/free-robux-stream_GM431946152.pdfIn PDF document text
    • https://www.albrighteducationcentre.co.uk/admin/ckfinder/userfiles/files/roblox-hack-com_GM431946152.pdfIn PDF document text
    • https://www.albrighteducationcentre.co.uk/admin/ckfinder/userfiles/files/how-to-make-free-robux_GM431946152.pdfIn PDF document text
    • https://www.albrighteducationcentre.co.uk/admin/ckfinder/userfiles/files/completed-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.albrighteducationcentre.co.uk/admin/ckfinder/userfiles/files/how-to-use-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://www.albrighteducationcentre.co.uk/admin/ckfinder/userfiles/files/hack-cuentas-gratis-en-roblox-pastebin_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_off000030d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30D4 22352 bytes
SHA-256: b5b8a99b1697d46314b30ce2abaab054e0e896b9069279eb721f21aad4299dd0
font_01_sfnt_off000062b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62B8 20132 bytes
SHA-256: 9d543b218f76da85b115eec436649c45a36d61030086af4e0a98f96e7e9ce1eb

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