Malicious PDF — malware analysis report

Static analysis result for SHA-256 445a4ea4e7c05754…

MALICIOUS

PDF

35.0 KB Created: 2021-07-04 03:52:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-11
MD5: 202a753c72f57703033787f0568cf57f SHA-1: d387c6169de4d64c3892dd8e67e9d991f868f295 SHA-256: 445a4ea4e7c05754d2e5235c7b8c4256f5b6a51a41374f34a10c1efd84ec4ad6
160 Risk Score

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/how-to-get-minecraft-pocket-edition-for-free-game-hack In PDF document text
    • http://fobh.net/userfiles/files/how-to-get-free-robux-inspect-element-2021_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/coin-master-twitter_GM406889139.pdfIn PDF document text
    • http://fobh.net/userfiles/files/how-to-get-free-admin-in-roblox_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • http://fobh.net/userfiles/files/minecraft-java-hacks_GM479516143.pdfIn PDF document text
    • http://fobh.net/userfiles/files/rewards-roblox-com_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/coin-master-hack-online_GM406889139.pdfIn PDF document text
    • http://fobh.net/userfiles/files/is-minecraft-free-on-computer_GM479516143.pdfIn PDF document text
    • http://fobh.net/userfiles/files/uprobuxcom-free-robux_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/is-roblox-free-on-nintendo-switch_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/free-robux-groups-2021_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/legit-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://fobh.net/userfiles/files/how-to-get-free-robux-hack-easy_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/is-tiktok-free_GM835599320.pdfIn PDF document text
    • http://fobh.net/userfiles/files/free-minecraft-hosting_GM479516143.pdfIn PDF document text
    • http://fobh.net/userfiles/files/coin-master-free-spins-and-coins-generator_GM406889139.pdfIn PDF document text
    • http://fobh.net/userfiles/files/60-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://fobh.net/userfiles/files/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdfIn PDF document text
    • http://fobh.net/userfiles/files/how-do-you-get-how-do-you-get-free-robux_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_off00003295.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3295 22756 bytes
SHA-256: 5c2d214ca3936364992a73193a11d9e61570ce7d2ceecc44a13f114ec3a841b1
font_01_sfnt_off00006550.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6550 18660 bytes
SHA-256: b13a25137ff5bf184941611dadd5274b7697b7880b48ae01eb7c808e4237078c