Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f11713801e3b705…

MALICIOUS

PDF

45.8 KB Created: 2021-06-04 00:14:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 2fbcf3b2ee7803377248d355af5cfaa0 SHA-1: 38c8108b48efab917ebdfa034e62edf12aa4df7e SHA-256: 1f11713801e3b705060fa493a705297b0d475c82af3fba3049b95ba3ddc7af2c
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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.online/app/431946152/free-robux-no-human-verification-game-hack PDF link annotation
    • http://lib.vipklh.ru/repository/50-000-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/minecraft-pc-download-free-full-version_GM479516143.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/coin-master-free-spins-links-2021_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/static-moonactive-net-rewards_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/roblox-adopt-me-hack_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/minecraft-auto-miner-hack_GM479516143.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/how-to-get-minecraft-on-chromebook-for-free_GM479516143.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/blox-pink-robux-free_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/free-coin-master-gifts_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/free-spins-and-coins-blogspot-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/minecraft-java-edition-key-free_GM479516143.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/coin-master-free-spin-download_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/free-spins-and-coins-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/roblox-hack-download-pc_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/free-roblox-accounts-generator_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/coin-master-32-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/get-robux_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/to-get-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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000052eb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52EB 25828 bytes
SHA-256: 4a8eb7604030ed4d74d244c6d2ed3ffc4409c76410a621ff976ce39e506c5574
font_01_sfnt_off00008ef7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EF7 18860 bytes
SHA-256: 7bf6b254896799c3550cbaf8339a45bd8c79022df116fd793fc899e49cde55bc

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