Malicious PDF — malware analysis report

Static analysis result for SHA-256 99ff7f2252bd2b56…

MALICIOUS

PDF

34.8 KB Created: 2021-07-03 11:21:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 76f6e696cb9d39aeddddf4d220a0121a SHA-1: 341885f41c7118bc3d54e05393b12854c6200f18 SHA-256: 99ff7f2252bd2b56738524ba988739ba2ccfbc98632e1c836050209081293400
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple heuristics indicating it is a lure for game hacks, specifically linking to a known malicious redirector. The document body and embedded URLs reinforce this, pointing to 'Coin Master' and other game-related cheats. The primary IOC is the malicious redirector URL, which likely serves as a gateway to further malicious content or exploits.

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-link-daily-game-hack In PDF document text
    • https://ptun-kupang.go.id/new/public/ckfinder/userfiles/files/coin-master-hack-no-survey-or-verification_GM406889139.pdfIn PDF document text
    • https://ptun-kupang.go.id/new/public/ckfinder/userfiles/files/easy-robux-hacks-2021_GM431946152.pdfIn PDF document text
    • https://ptun-kupang.go.id/new/public/ckfinder/userfiles/files/coin-master-cards-for-free_GM406889139.pdfIn PDF document text
    • https://ptun-kupang.go.id/new/public/ckfinder/userfiles/files/mad-city-roblox-money-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • https://ptun-kupang.go.id/new/public/ckfinder/userfiles/files/sake-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://ptun-kupang.go.id/new/public/ckfinder/userfiles/files/mcpe-master-hack-coins_GM406889139.pdfIn PDF document text
    • https://ptun-kupang.go.id/new/public/ckfinder/userfiles/files/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • https://ptun-kupang.go.id/new/public/ckfinder/userfiles/files/how-to-buy-anything-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://ptun-kupang.go.id/new/public/ckfinder/userfiles/files/free-20b-robux_GM431946152.pdfIn PDF document text
    • https://ptun-kupang.go.id/new/public/ckfinder/userfiles/files/roblox-item-codes-free_GM431946152.pdfIn PDF document text
    • https://ptun-kupang.go.id/new/public/ckfinder/userfiles/files/how-do-you-get-free-robux-and-tix_GM431946152.pdfIn PDF document text
    • https://ptun-kupang.go.id/new/public/ckfinder/userfiles/files/roblox-avatar-the-last-airbender-cheats_GM431946152.pdfIn PDF document text
    • https://ptun-kupang.go.id/new/public/ckfinder/userfiles/files/roblox-free-rubox_GM431946152.pdfIn PDF document text
    • https://ptun-kupang.go.id/new/public/ckfinder/userfiles/files/how-to-hack-roblox-2021-august_GM431946152.pdfIn PDF document text
    • https://ptun-kupang.go.id/new/public/ckfinder/userfiles/files/wurst-115-2_GM479516143.pdfIn PDF document text
    • https://ptun-kupang.go.id/new/public/ckfinder/userfiles/files/haktuts-2021-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • https://ptun-kupang.go.id/new/public/ckfinder/userfiles/files/roblox-noclip-and-fly-hacks_GM431946152.pdfIn PDF document text
    • https://ptun-kupang.go.id/new/public/ckfinder/userfiles/files/minecraft-pe-hack-client_GM479516143.pdfIn PDF document text
    • https://ptun-kupang.go.id/new/public/ckfinder/userfiles/files/how-are-roblox-cheaters-cheating_GM431946152.pdfIn PDF document text
    • https://ptun-kupang.go.id/new/public/ckfinder/userfiles/files/robux-free-roblox-glitch-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
font_00_sfnt_off0000321f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x321F 22632 bytes
SHA-256: 6a84064cfee90c63e289f5b5ce73a2b72062e2198ce0b7c34b2586a80c614125
font_01_sfnt_off00006478.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6478 18588 bytes
SHA-256: 5c14532fc2e0aae9a5b258814547b169b116322b331244fa0e17de8eda3c88e0

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