Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8b8016ff0bc09ce…

MALICIOUS

PDF

32.4 KB Created: 2021-07-05 22:15:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c618614f4b05fd8a07106b480710db4a SHA-1: 98f5336aa68f36c4ed5ac2cd8a8fa02b043f5615 SHA-256: d8b8016ff0bc09ce2d4b2705cb17511cc1a7c84e2257a4e426b391a74b88ad8c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to 'Robux generators' and 'game hacks' to entice users into clicking malicious links. The primary link, http://netcdn.tw/app/431946152/instantrobux-game-hack, is identified as a malicious redirector. The document's structure and embedded URLs suggest an attempt to deliver a secondary payload or lead the user to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/instantrobux-game-hack In PDF document text
    • http://stitqi.ac.id/website/repository/hack-coin-master-online-without-human-verification_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/free-roblox-com_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/how-to-get-robux-easy_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/links-for-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/free-bling-bling-card-coin-master_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/hack-coin-master-2021-pc_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/how-to-make-a-free-robux-game-v3rmillion_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/wurst-18-9_GM479516143.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/minecraft-ios-mods_GM479516143.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/free-i-robux_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/hacker-avatar-roblox_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/earn-robux-online_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/robux-hack-sin-verificacion_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/coin-master-hack-activegamer_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/free-roblox-gift-card-codes_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/crate-clicker-roblox-hack_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/roblox-speed-hack-2021-may_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/coin-master-free-2021_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/hack-coin-master-download_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/roblox-cheat_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
font_00_sfnt_off0000293a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x293A 22280 bytes
SHA-256: a081a0ec7878a75f4899c4b92e7bc8ce86f1e0f69e6c00b0b3644e5b818c8bd6
font_01_sfnt_off00005ac6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AC6 18656 bytes
SHA-256: 5a13a4ba7d4aa3ba564163d7fd1f4e40de414e0c8b16d10ac9018e4301010f0d

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