Malicious PDF — malware analysis report

Static analysis result for SHA-256 526c800a45f124e4…

MALICIOUS

PDF

35.0 KB Created: 2021-07-06 07:52:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: b85a311d1ea94062abb2e94a58fa6759 SHA-1: 184337c9237fbb21ff3b1a409aadee0a5cfe6d70 SHA-256: 526c800a45f124e4e009bba597192b0a37887286f83deb63bcb6a18e2523fb50
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 0.9980

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 http://netcdn.tw/app/406889139/free-spins-for-coin-master-on-1-19-19-game-hack PDF link annotation
    • http://lib.uho.ac.id/library//repository/minecraft-free-download-mac_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/free-robux-link_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/how-to-get-free-robux-games_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-20-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/free-minecraft-skin-packs_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/free-robux-working_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/hack-coin-master-download_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/roblox-zombie-rush-free-guns_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-admin-roblox_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-hack-tool-no-human-verification_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-hack-apk-july-29_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/roblox-hack-generator_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-spins-promo-code-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-reward-link_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/minecraft-mod-menu-apk_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-minecraft-codes_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/roblox-promo-codes-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_002_off00003121.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3121 23172 bytes
SHA-256: 0e956ee687aa08f1e588771ec9a6e8bf3aa49384d6f19856d21d91da23576997
font_01_sfnt_off00006573.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6573 18444 bytes
SHA-256: 86099eac99b49e045dc65b52a644e7fa6a75423fce7a6a7293a1bd171e463473

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