Malicious PDF — malware analysis report

Static analysis result for SHA-256 fde93b0aa522bda0…

MALICIOUS

PDF

41.7 KB Created: 2021-05-11 06:36:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 361f2236c5904d9109be66aa0cd03fb8 SHA-1: 6d21f249a7afbc073c1d245318cd522cd6b2f5a9 SHA-256: fde93b0aa522bda0ac7551216023cf7dcd9628d4ef8050b85399ff468c0e5fc7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to a redirector service that ultimately leads to a page offering game hacks and free spins. The ML classifier also flagged this PDF as malicious. The primary malicious URL identified is https://netcdn.xyz/app/406889139/80-free-spins-coin-master-game-hack, which is likely used to host or redirect to a malicious payload.

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/406889139/80-free-spins-coin-master-game-hack In PDF document text
    • http://www.compusiteinc.com/images/roblox-catalog-free_GM431946152.pdfIn PDF document text
    • http://www.compusiteinc.com/images/free-coin-master-hack-no-verification_GM406889139.pdfIn PDF document text
    • http://www.compusiteinc.com/images/roblox-fun-robux_GM431946152.pdfIn PDF document text
    • http://www.compusiteinc.com/images/free-robux-kid-friendly-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.compusiteinc.com/images/how-to-get-free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.compusiteinc.com/images/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.compusiteinc.com/images/coin-master-money-hack_GM406889139.pdfIn PDF document text
    • http://www.compusiteinc.com/images/minecraft-windows-10-free-trial_GM479516143.pdfIn PDF document text
    • http://www.compusiteinc.com/images/free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://www.compusiteinc.com/images/coin-master-hacks-to-get-spins_GM406889139.pdfIn PDF document text
    • http://www.compusiteinc.com/images/free-coins-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.compusiteinc.com/images/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • http://www.compusiteinc.com/images/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.compusiteinc.com/images/robux-page_GM431946152.pdfIn PDF document text
    • http://www.compusiteinc.com/images/free-minecraft-mods-for-pc_GM479516143.pdfIn PDF document text
    • http://www.compusiteinc.com/images/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.compusiteinc.com/images/free-robux-obby-2021_GM431946152.pdfIn PDF document text
    • http://www.compusiteinc.com/images/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • http://www.compusiteinc.com/images/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://www.compusiteinc.com/images/free-roblox-accounts-with-robux-that-work-2021_GM431946152.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_off000047f0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47F0 24652 bytes
SHA-256: 6ec098185812e020c0c859e2519ecc45b82c44cd1108b3893d88f47f91a773e6
font_01_sfnt_off000080b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80B3 18268 bytes
SHA-256: c17bdfe55bcf294db1fa8b97ef7603a16e409092d20395243f391f783e354714

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