Malicious PDF — malware analysis report

Static analysis result for SHA-256 cee726496d85ebfd…

MALICIOUS

PDF

54.6 KB Created: 2021-06-03 09:27:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 1926791d47adc4bf3d743d54effa9341 SHA-1: 6c994854330040d7342d7b76f2a5d731dc0276f1 SHA-256: cee726496d85ebfd61b8beecf2fff41c4b42f5c30dbef51e96c2414447362df4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, masquerading as "free generators" or "game hacks" for popular games. The primary malicious URL identified is https://netcdn.online/app/431946152/free-robux-microsoft-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a lure designed to redirect users to potentially harmful content, likely for further exploitation or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9649

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.online/app/431946152/free-robux-microsoft-game-hack In PDF document text
    • https://www.legclub.org/uploads/files/files/coin-master-unlimited-spin-hack-apk_GM406889139.pdfIn PDF document text
    • https://www.legclub.org/uploads/files/files/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.legclub.org/uploads/files/files/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • https://www.legclub.org/uploads/files/files/minecraft-windows-free_GM479516143.pdfIn PDF document text
    • https://www.legclub.org/uploads/files/files/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • https://www.legclub.org/uploads/files/files/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.legclub.org/uploads/files/files/real-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.legclub.org/uploads/files/files/tiktok-free-64-bit_GM835599320.pdfIn PDF document text
    • https://www.legclub.org/uploads/files/files/minecraft-tiktok-hacks_GM479516143.pdfIn PDF document text
    • https://www.legclub.org/uploads/files/files/coin-master-free-daily-spins-2021_GM406889139.pdfIn PDF document text
    • https://www.legclub.org/uploads/files/files/robux-generators-that-actually-work_GM431946152.pdfIn PDF document text
    • https://www.legclub.org/uploads/files/files/free-robux-app_GM431946152.pdfIn PDF document text
    • https://www.legclub.org/uploads/files/files/apps-for-free-robux_GM431946152.pdfIn PDF document text
    • https://www.legclub.org/uploads/files/files/how-to-get-free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.legclub.org/uploads/files/files/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://www.legclub.org/uploads/files/files/microsoft-rewards-robux_GM431946152.pdfIn PDF document text
    • https://www.legclub.org/uploads/files/files/free-minecraft-survival-server_GM479516143.pdfIn PDF document text
    • https://www.legclub.org/uploads/files/files/minecraft-windows-10-mod-menu_GM479516143.pdfIn PDF document text
    • https://www.legclub.org/uploads/files/files/coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.legclub.org/uploads/files/files/free-minecraft-maps_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000052d8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52D8 38728 bytes
SHA-256: 983fbd3468553c690d72a75936747d34d749fb072e5e237068bd519e350f411a
font_01_sfnt_off0000a8a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA8A8 2952 bytes
SHA-256: 79d302a59db1619e36f2516a27377a299592bdaf6c6ea87fbaa735e9f738b226
font_02_sfnt_off0000b2e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2E5 18436 bytes
SHA-256: 753f3f2a839cbba740b1165c82973d17105d10f1d8ffbf22e8371d7b58d196dd

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