Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a7e236b3247b024…

MALICIOUS

PDF

34.3 KB Created: 2021-07-03 16:08:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 103c4f2a82695af50bbfff744c5b083b SHA-1: c9174148d2a289fe559726ea17578e74b9173868 SHA-256: 5a7e236b3247b02484b2af24c97c05c7edbffb0d7389a42874bed866f18e5632
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors, disguised as "free generator" or "game hack" lures. The embedded URLs, such as http://netcdn.tw/app/479516143/minecraft-skins-download-free-game-hack, are designed to lead users to potentially harmful content or malware downloads. The presence of these links and the ML classifier's high confidence score indicate a malicious intent to exploit user curiosity for illicit purposes.

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/479516143/minecraft-skins-download-free-game-hack In PDF document text
    • http://bob-reid.co.uk/uploads/files/files/proxo-roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://bob-reid.co.uk/uploads/files/files/how-to-get-money-for-free-on-roblox_GM431946152.pdfIn PDF document text
    • http://bob-reid.co.uk/uploads/files/files/coin-master-hack-spin-generator-tool_GM406889139.pdfIn PDF document text
    • http://bob-reid.co.uk/uploads/files/files/pokemon-go-free-zip_GM1094591345.pdfIn PDF document text
    • http://bob-reid.co.uk/uploads/files/files/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • http://bob-reid.co.uk/uploads/files/files/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • http://bob-reid.co.uk/uploads/files/files/free-roblox-injector_GM431946152.pdfIn PDF document text
    • http://bob-reid.co.uk/uploads/files/files/free-roblox-accounts-november-2021_GM431946152.pdfIn PDF document text
    • http://bob-reid.co.uk/uploads/files/files/comment-hack-roblox-facile_GM431946152.pdfIn PDF document text
    • http://bob-reid.co.uk/uploads/files/files/how-to-get-1-billion-robux-for-free_GM431946152.pdfIn PDF document text
    • http://bob-reid.co.uk/uploads/files/files/moon-active-games_GM406889139.pdfIn PDF document text
    • http://bob-reid.co.uk/uploads/files/files/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • http://bob-reid.co.uk/uploads/files/files/roblox-robux-hack-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://bob-reid.co.uk/uploads/files/files/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdfIn PDF document text
    • http://bob-reid.co.uk/uploads/files/files/free-spin-app-coin-master_GM406889139.pdfIn PDF document text
    • http://bob-reid.co.uk/uploads/files/files/free-roblox-accounts-with-robux-and-obc-2021_GM431946152.pdfIn PDF document text
    • http://bob-reid.co.uk/uploads/files/files/how-to-hack-any-roblox-account-including-admins_GM431946152.pdfIn PDF document text
    • http://bob-reid.co.uk/uploads/files/files/free-robux-no-bc_GM431946152.pdfIn PDF document text
    • http://bob-reid.co.uk/uploads/files/files/no-robux_GM431946152.pdfIn PDF document text
    • http://bob-reid.co.uk/uploads/files/files/free-minecraft-account-reddit_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_off000031da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31DA 21780 bytes
SHA-256: 3748d05158f0d2fe93e9e5b6f4721d7e48fd3e6f17c003c26aba525264c0f9a0
font_01_sfnt_off000061dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61DC 18748 bytes
SHA-256: caac3017402713390db328034182a8378ae11b4318c04c7e478aff4389fa23cd

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