Malicious PDF — malware analysis report

Static analysis result for SHA-256 999b9f7a8c73ca6f…

MALICIOUS

PDF

46.8 KB Created: 2021-06-09 02:36:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 929277a088624f8b04157c2f333d0364 SHA-1: aaaf5113c8022823f323e5d726443cc2bc925289 SHA-256: 999b9f7a8c73ca6f7753c3d9376ceaa7e0814262b85bbd5c76204a33fbf22c1c
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains embedded links pointing to known malicious redirector infrastructure, specifically for game-related cheats and hacks. The ML classifier also flagged this PDF as malicious with high confidence. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9748

Heuristics 3

  • 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.tw/app/431946152/roblox-clone-tycoon-v-1.2-cheats-game-hack In PDF document text
    • http://lib.vipklh.ru/repository/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/op-rewards-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/coin-master-hack-tool-for-pc_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/free-spins-coin-master-links-blogspot_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/game-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/coin-master-gold-cards-free-2021_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/free-coin-and-spin-link_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/coin-master-free-spins-facebook_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/roblox-account-taker_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/hack-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/how-to-get-free-premium-roblox_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/free-roblox-accounts-generator_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/minecraft-java-edition-free-code_GM479516143.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/how-to-get-a-free-dominus-in-roblox_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/get-me-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/cm-daily-spins_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/www-robux-redeem_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/coin-master-cheats-2021_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/earn-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004e5e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E5E 24912 bytes
SHA-256: a6b1c0815387718db0e6d360312b7d196c6d994fc5498a57329cdf2969b83ea7
font_01_sfnt_off0000875c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x875C 3012 bytes
SHA-256: ea730caf108ebad3375e06643ac09f96113c7f497f8970db1c262632c2ba43d7
font_02_sfnt_off000091d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91D5 18892 bytes
SHA-256: 54deea468765f92de75ac7f5e9b0f9d453d310283ea05eec0ceaf51d52801d2b

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