Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dcd72cdec645ac6…

MALICIOUS

PDF

36.0 KB Created: 2021-07-06 13:38:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 50107a73470a12b29dc4e98a353dcf89 SHA-1: 10f7e4fd7869ed44a90aede143358dce734f299f SHA-256: 2dcd72cdec645ac6af961db74f19114c70ff666e1fa994ae095e2f9caeaea41f
82 Risk Score

Malware Insights

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

The PDF document contains multiple embedded URLs that are presented as lures for game hacks and free spins. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' strongly indicates that these links are designed to redirect users to malicious websites or initiate unwanted downloads. The ML classifier also flagged this PDF as malicious with high confidence.

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/coin-master-free-spins-2021-app-download-game-hack PDF link annotation
    • http://lib.uho.ac.id/library/repository/coin-master-hack-mod-apk-unlimited-spins_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/hack-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/easy-robux-com_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/roblox-fly-hack-cheat-engine-64_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/roblox-elemental-battlegrounds-cheats_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/hack-coin-master-32-mod-apk_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/download-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-free-gold-cards-link-2021ee-spins_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-hack-apk-download-2021_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-heaven-links-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-robux-apk-extension_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/gain-robux_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/where-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-free-spin-generator-without-human-verification_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-minecraft-skin-maker_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/hack-players-in-roblox_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
stream_002_off000032f6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32F6 23212 bytes
SHA-256: 143afc724f5b91654dee042a86155a73458e398a6ff3bf9af745943d113b6d4e
font_01_sfnt_off00006772.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6772 19156 bytes
SHA-256: 610ae378c9cc4c83123dbbc111aaf327ebb15e20175b345a881081f690b9164c

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