Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e90b319fa7bd30b…

MALICIOUS

PDF

42.7 KB Created: 2021-05-14 12:32:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b5b62fbf8d1a1ee274593e0029c278c0 SHA-1: 5ec12704646c3a0aa048ddfe9cb03b2bc23649e6 SHA-256: 7e90b319fa7bd30b9d14cb1bdf99aee261664a53b630756178f236c0f7e0507f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting game hacks and generators. The primary lure URL is https://netcdn.xyz/app/431946152/tower-of-hell-roblox-hack-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly indicate a social engineering tactic to redirect users to potentially harmful content, likely for further exploitation or malware delivery.

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/431946152/tower-of-hell-roblox-hack-game-hack In PDF document text
    • https://www.99champions.com/uploaded_files/userfiles/files/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://www.99champions.com/uploaded_files/userfiles/files/coin-master-coins_GM406889139.pdfIn PDF document text
    • https://www.99champions.com/uploaded_files/userfiles/files/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.99champions.com/uploaded_files/userfiles/files/roblox-pics_GM431946152.pdfIn PDF document text
    • https://www.99champions.com/uploaded_files/userfiles/files/minecraft-for-chromebook-free_GM479516143.pdfIn PDF document text
    • https://www.99champions.com/uploaded_files/userfiles/files/free-24-7-minecraft-server_GM479516143.pdfIn PDF document text
    • https://www.99champions.com/uploaded_files/userfiles/files/free-spins-coin-master-october-17-2021_GM406889139.pdfIn PDF document text
    • https://www.99champions.com/uploaded_files/userfiles/files/coin-master-hack-online-without-human-verification_GM406889139.pdfIn PDF document text
    • https://www.99champions.com/uploaded_files/userfiles/files/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • https://www.99champions.com/uploaded_files/userfiles/files/microsoft-bing-robux_GM431946152.pdfIn PDF document text
    • https://www.99champions.com/uploaded_files/userfiles/files/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • https://www.99champions.com/uploaded_files/userfiles/files/minecraft-for-ipad-free_GM479516143.pdfIn PDF document text
    • https://www.99champions.com/uploaded_files/userfiles/files/coin-master-free-spins-hack-download_GM406889139.pdfIn PDF document text
    • https://www.99champions.com/uploaded_files/userfiles/files/roblox-free-clothes-codes_GM431946152.pdfIn PDF document text
    • https://www.99champions.com/uploaded_files/userfiles/files/free-roblox-toys_GM431946152.pdfIn PDF document text
    • https://www.99champions.com/uploaded_files/userfiles/files/coin-hackhub-coin-master_GM406889139.pdfIn PDF document text
    • https://www.99champions.com/uploaded_files/userfiles/files/minecraft-mod-updater_GM479516143.pdfIn PDF document text
    • https://www.99champions.com/uploaded_files/userfiles/files/robux-gratis_GM431946152.pdfIn PDF document text
    • https://www.99champions.com/uploaded_files/userfiles/files/roblox-rewards_GM431946152.pdfIn PDF document text
    • https://www.99champions.com/uploaded_files/userfiles/files/get-minecraft-windows-10-free_GM479516143.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_off00004868.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4868 27204 bytes
SHA-256: 150aae0fa103c0e17be3814b2e22cc242b13aa18ab8613dd1800f5f060423429
font_01_sfnt_off00008434.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8434 18344 bytes
SHA-256: 03b0a99fcd61db89faa26c1828de523dc9cf9d0c2b9dbfe52dc8b55ccb7305a4

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