Malicious PDF — malware analysis report

Static analysis result for SHA-256 519c5f4372d1d6a7…

MALICIOUS

PDF

33.7 KB Created: 2021-07-04 12:52:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: df530d5f4849de4e700f72b21c725fb7 SHA-1: c35de01fac6144c8a7b723215702895e24b897b5 SHA-256: 519c5f4372d1d6a74d50c2ee9fa5cf22cdcebad4447c64897a1f58a4a334a6c6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites, including a known malicious redirector at http://netcdn.tw/app/431946152/how-to-hack-and-get-free-robux-game-hack. These links are presented as 'free generators' or 'game hacks' to entice users to click. The document body and heuristics indicate a lure for potentially unwanted software or malware downloads. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

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/431946152/how-to-hack-and-get-free-robux-game-hack In PDF document text
    • https://www.lifegoeson.in/uploaded_files/userfiles/files/roblox-hack-download-windows-10_GM431946152.pdfIn PDF document text
    • https://www.lifegoeson.in/uploaded_files/userfiles/files/roblox-vehicle-simulator-hack-script_GM431946152.pdfIn PDF document text
    • https://www.lifegoeson.in/uploaded_files/userfiles/files/get-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.lifegoeson.in/uploaded_files/userfiles/files/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.lifegoeson.in/uploaded_files/userfiles/files/free-robux-from-offers-on-pc_GM431946152.pdfIn PDF document text
    • https://www.lifegoeson.in/uploaded_files/userfiles/files/free-hair-roblox-2021_GM431946152.pdfIn PDF document text
    • https://www.lifegoeson.in/uploaded_files/userfiles/files/free-robux-for-surveys_GM431946152.pdfIn PDF document text
    • https://www.lifegoeson.in/uploaded_files/userfiles/files/how-to-hack-other-peoples-invertorys-on-roblox-adopt-me_GM431946152.pdfIn PDF document text
    • https://www.lifegoeson.in/uploaded_files/userfiles/files/minecraft-windows-10-edition-free-download_GM479516143.pdfIn PDF document text
    • https://www.lifegoeson.in/uploaded_files/userfiles/files/robux-hack-tools_GM431946152.pdfIn PDF document text
    • https://www.lifegoeson.in/uploaded_files/userfiles/files/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.lifegoeson.in/uploaded_files/userfiles/files/free-minecraft-svg-cutting-files_GM479516143.pdfIn PDF document text
    • https://www.lifegoeson.in/uploaded_files/userfiles/files/how-to-get-free-robux-in-meep-city_GM431946152.pdfIn PDF document text
    • https://www.lifegoeson.in/uploaded_files/userfiles/files/free-money-codes-in-roblox-vehicle-simulator_GM431946152.pdfIn PDF document text
    • https://www.lifegoeson.in/uploaded_files/userfiles/files/free-robux-cards_GM431946152.pdfIn PDF document text
    • https://www.lifegoeson.in/uploaded_files/userfiles/files/coin-master-hack-account_GM406889139.pdfIn PDF document text
    • https://www.lifegoeson.in/uploaded_files/userfiles/files/get-free-robux-today_GM431946152.pdfIn PDF document text
    • https://www.lifegoeson.in/uploaded_files/userfiles/files/money-in-pokemon-go-free_GM1094591345.pdfIn PDF document text
    • https://www.lifegoeson.in/uploaded_files/userfiles/files/what-are-points-for-in-roblox_GM431946152.pdfIn PDF document text
    • https://www.lifegoeson.in/uploaded_files/userfiles/files/free-minecraft-texture-packs_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
font_00_sfnt_off00002f7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F7B 21296 bytes
SHA-256: d67949cd2304fd1287f2468d93c245a15ae540acf69e0996a18c9a655fb3e445
font_01_sfnt_off00005dc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DC7 19328 bytes
SHA-256: 38bb1ef0d1232593bc33faeb07ab7c9da97d5775ca686b5d0190a8681bcdbe68

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