Malicious PDF — malware analysis report

Static analysis result for SHA-256 c94ffb6f548ed29a…

MALICIOUS

PDF

34.9 KB Created: 2021-07-05 18:33:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 2cd7e302eb2a379274959e01e12d9871 SHA-1: f93a26cbb1a335f10841bce45a936b9c9f119768 SHA-256: c94ffb6f548ed29a160ff80252c36d6322c3b50967b84a7ffcd2a67492fe1a2e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one pointing to known malicious redirector infrastructure at http://netcdn.tw/app/406889139/hack-spin-coin-master-game-hack. The document body and heuristics indicate a lure for game hacks or generators, suggesting a phishing or scam attempt. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lure strongly suggest a malicious intent to redirect users to potentially harmful sites.

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/hack-spin-coin-master-game-hack In PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/get-robux-com_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/how-to-get-free-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/pokemon-go-free-in-app-purchases_GM1094591345.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/free-robux-no-downloading-apps_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/how-to-setup-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/free-robux-com-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/how-to-get-free-robux-easy-2021-pc_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/hack-de-velocidad-roblox-booga-booga_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/dragon-ball-z-online-cheats-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/real-robux-hack-no-survey-2021-february_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/roblox-script-hack-pizza-factory_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/roblox-inspect-element-cheat-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/coin-master-free-spins-daily-link-updated_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/get-free-robux-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/free-roblox-clothes-girl_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_002_off00003257.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3257 22940 bytes
SHA-256: 2d7976ff71f0c1bcf50dabd788623216e4e6bdfe58a68e145c81a003e07df920
font_01_sfnt_off000065e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65E9 18180 bytes
SHA-256: 5cfedaf359300f2d78c418cab4259cb31a5fa1e14dd5a50147ba7c045b472e8a

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