Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd1c5360c2689a90…

MALICIOUS

PDF

36.1 KB Created: 2021-07-05 05:28:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 599843a491bdfd45038676f42070499a SHA-1: 7ca93d948264cd0995c3beca851c5e948f24a316 SHA-256: bd1c5360c2689a90e9415235b6d4a3bdd5f6e24defd5f210a7a8a62c2da77e45
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors and domains hosting game-related lures, such as 'Coin Master Free Daily Spins' and 'free Robux'. The primary malicious URL identified is http://netcdn.tw/app/406889139/coin-master-free-daily-spins-link-game-hack. The document's structure and embedded URLs strongly suggest it is designed to trick users into visiting malicious sites, likely for credential harvesting or malware distribution.

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.tw/app/406889139/coin-master-free-daily-spins-link-game-hack In PDF document text
    • http://zagorjeadventureteam.hr/files/get-me-free-robux_GM431946152.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/buy-robux-free_GM431946152.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/free-spins-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/cheats-coin-master-free_GM406889139.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/hack-my-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/free-robux-no-survey-2021-no-verification_GM431946152.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/roblox-playset-for-free-shirts_GM431946152.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/youtube-roblox-working-hack-tool_GM431946152.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/freespinandcoin-blogspot-coin-master_GM406889139.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/coin-master-cheats-and-hacks_GM406889139.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/coin-master-gifts_GM406889139.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/free-roblox-script-executor_GM431946152.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/roblox-cheats-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/8rsh-roblox-jailbreak-free-vip-server_GM431946152.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/are-pubg-uc-available_GM1330123889.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/coin-master-coins_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
font_00_sfnt_off0000354d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x354D 23060 bytes
SHA-256: 41dcfe2efd0f800bc0f51d0760d8ef3277cfee3ba1a0682e19441cd8f41fe64f
font_01_sfnt_off000068e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68E6 18768 bytes
SHA-256: 0ceb7b0488aaa16a0c23cac8de9df794ae3fa7cd27271b33a51c469a71425e8d

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