Malicious PDF — malware analysis report

Static analysis result for SHA-256 8897e3049c0d7c57…

MALICIOUS

PDF

42.1 KB Created: 2021-05-12 23:02:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 3b06dec0e6195a19601d973f29143647 SHA-1: 1268e3b7af47b703ce407322148fb22ecb1508e5 SHA-256: 8897e3049c0d7c57cb4be225b2feb14e9fb88176354f97503d63ed9479a445d8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to game hacks and free spins, as indicated by the heuristic PDF_GAME_HACK_REDIRECT_LURE. It contains multiple links to known malicious redirector infrastructure, such as https://netcdn.xyz/app/406889139/2021-free-spins-coin-master-game-hack, which likely serves to deliver a second-stage payload. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/406889139/2021-free-spins-coin-master-game-hack In PDF document text
    • http://grupodin.com.br/images/coin-master-free-spins-heaven_GM406889139.pdfIn PDF document text
    • http://grupodin.com.br/images/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • http://grupodin.com.br/images/how-to-get-more-robux-for-free_GM431946152.pdfIn PDF document text
    • http://grupodin.com.br/images/coin-master-in-app-purchase-hack_GM406889139.pdfIn PDF document text
    • http://grupodin.com.br/images/minecraft-bedrock-edition-hacks_GM479516143.pdfIn PDF document text
    • http://grupodin.com.br/images/roblox-adopt-me-hack_GM431946152.pdfIn PDF document text
    • http://grupodin.com.br/images/coin-master-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://grupodin.com.br/images/coin-master-hack-spin-generator_GM406889139.pdfIn PDF document text
    • http://grupodin.com.br/images/10-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://grupodin.com.br/images/roblox-free-play_GM431946152.pdfIn PDF document text
    • http://grupodin.com.br/images/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • http://grupodin.com.br/images/minecraft-windows-10-free-with-java_GM479516143.pdfIn PDF document text
    • http://grupodin.com.br/images/download-minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • http://grupodin.com.br/images/minecraft-pe-free-ios_GM479516143.pdfIn PDF document text
    • http://grupodin.com.br/images/coin-master-hacker-club_GM406889139.pdfIn PDF document text
    • http://grupodin.com.br/images/coinmaster-spin-ml_GM406889139.pdfIn PDF document text
    • http://grupodin.com.br/images/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://grupodin.com.br/images/tryrbx-site-free-robux_GM431946152.pdfIn PDF document text
    • http://grupodin.com.br/images/free-robux-that-actually-works_GM431946152.pdfIn PDF document text
    • http://grupodin.com.br/images/free-multiplayer-minecraft-server_GM479516143.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
stream_003_off00004897.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4897 24852 bytes
SHA-256: 00bba6f2caaa3159ddfd5377af9b81ee5b367e9ced544c2f9eecbda53fc526f7
font_01_sfnt_off000081f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81F0 18288 bytes
SHA-256: d5a46c40ddaffffdec7b194e78d64597afed9f46b5e12e45e50a00bb771aa4a6

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