Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff203b99c49afef7…

MALICIOUS

PDF

43.0 KB Created: 2021-05-19 04:00:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 01fb6f16f5e221d907b603e697103b3f SHA-1: 535cf4daa8148fc183cf4df339f55ee12eea10f9 SHA-256: ff203b99c49afef700be5fe9462a2a9ffda8ac8222cc6606b9f9367553aaa4f8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirector domains, specifically promoting game hacks and generators. The primary lure URL, https://netcdn.xyz/app/406889139/hack-card-collection-coin-master-game-hack, is associated with malicious redirector infrastructure. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a social engineering attack aiming to drive traffic to potentially malicious sites, likely for further payload delivery or phishing.

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/hack-card-collection-coin-master-game-hack In PDF document text
    • https://sisomdethospital.com/ckfinder/userfiles/files/roblox-hack-generator_GM431946152.pdfIn PDF document text
    • https://sisomdethospital.com/ckfinder/userfiles/files/coin-master-hack-to-get-free-spins_GM406889139.pdfIn PDF document text
    • https://sisomdethospital.com/ckfinder/userfiles/files/free-spin-today-coin-master_GM406889139.pdfIn PDF document text
    • https://sisomdethospital.com/ckfinder/userfiles/files/how-to-get-free-spins-on-coin-master-2021-links_GM406889139.pdfIn PDF document text
    • https://sisomdethospital.com/ckfinder/userfiles/files/coin-master-hacks-for-iphone_GM406889139.pdfIn PDF document text
    • https://sisomdethospital.com/ckfinder/userfiles/files/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • https://sisomdethospital.com/ckfinder/userfiles/files/minecraft-windows-10-edition-free_GM479516143.pdfIn PDF document text
    • https://sisomdethospital.com/ckfinder/userfiles/files/free-coins-and-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://sisomdethospital.com/ckfinder/userfiles/files/coin-master-heaven-links_GM406889139.pdfIn PDF document text
    • https://sisomdethospital.com/ckfinder/userfiles/files/free-robux-codes-generator-no-verification_GM431946152.pdfIn PDF document text
    • https://sisomdethospital.com/ckfinder/userfiles/files/how-to-get-free-skins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://sisomdethospital.com/ckfinder/userfiles/files/how-to-get-free-coins-in-mcpe-master_GM406889139.pdfIn PDF document text
    • https://sisomdethospital.com/ckfinder/userfiles/files/roblox-free-hair-codes_GM431946152.pdfIn PDF document text
    • https://sisomdethospital.com/ckfinder/userfiles/files/watch-videos-for-robux_GM431946152.pdfIn PDF document text
    • https://sisomdethospital.com/ckfinder/userfiles/files/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • https://sisomdethospital.com/ckfinder/userfiles/files/coin-master-free-stuff-links_GM406889139.pdfIn PDF document text
    • https://sisomdethospital.com/ckfinder/userfiles/files/coin-master-hack-com_GM406889139.pdfIn PDF document text
    • https://sisomdethospital.com/ckfinder/userfiles/files/coin-master-gift-link_GM406889139.pdfIn PDF document text
    • https://sisomdethospital.com/ckfinder/userfiles/files/roblox-2021_GM431946152.pdfIn PDF document text
    • https://sisomdethospital.com/ckfinder/userfiles/files/free-spins-and-coins-coin-master_GM406889139.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_off00004a8f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A8F 24668 bytes
SHA-256: 80d8c35541b379fa27e79199fa77d23f19e74ef3ae2583bf7b3b041f6670a212
font_01_sfnt_off0000835e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x835E 19044 bytes
SHA-256: 18c684899496a353cc562135f74030c682c6cacf6a294cc73eef6a0d6c91b842

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