Malicious PDF — malware analysis report

Static analysis result for SHA-256 27ee3f683cd3dd3e…

MALICIOUS

PDF

46.5 KB Created: 2021-06-03 05:42:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 9a983d9a4307ab67edcd78ed667dfe21 SHA-1: a05413b866507881922920ccb40934aafa6f35d2 SHA-256: 27ee3f683cd3dd3e54fb2f1dbc8e3bd410a4aad062cebabc24ee4c8c1de7f2ec
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically advertising 'game hacks' and 'free robux' to lure users. The primary redirector URL is https://netcdn.online/app/406889139/coin-master-level-4-game-hack, which is designed to lead victims to further malicious content. No scripts were extracted, but the document's structure and embedded links strongly indicate a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9748

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.online/app/406889139/coin-master-level-4-game-hack In PDF document text
    • https://opac.heritagejkt.org/repository/funbloxxyz-free-robux_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/free-robux-sites-that-work_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/free-roblox-gfx_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/how-to-get-free-cards-on-coin-master_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/coin-master-free-spins-fb_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/roblox-games-with-free-radio_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/50-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/minecraft-app-store-free_GM479516143.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/coin-master-coins_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/cm-spins_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/i-need-robux_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/daily-spin-coin-master-free_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/how-to-get-free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/how-to-get-free-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/free-minecraft-coins_GM479516143.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/free-spin-hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/how-to-get-roblox-premium-for-free_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/free-minecraft-account-and-password-2021_GM479516143.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_004_off0000517b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x517B 25184 bytes
SHA-256: 9e4387323b8538cb490a0b24d974ba6512175d39147b3fc153cbf2de27397654
font_01_sfnt_off00008a63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A63 2880 bytes
SHA-256: b053084cafd01c649462d87667ba56c569d6480ce60e7d20ae57ef6124cf178e
font_02_sfnt_off0000944e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x944E 17796 bytes
SHA-256: a38909063335524848e6a39e33c0ae3f0b16aca26b06ee664efc1e2cd51527ce

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