Malicious PDF — malware analysis report

Static analysis result for SHA-256 5258e479ba0d71c2…

MALICIOUS

PDF

46.1 KB Created: 2021-06-09 07:25:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 6b47a9519422e9db45abfe3d1e6e8836 SHA-1: 15616fe807b3df2ee00589f1fc1a7bc86f2126d3 SHA-256: 5258e479ba0d71c27185baacfa60f0989cece1a8869a29f60214b65d93b9b03b
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.tw/app/431946152/pastebin-roblox-free-gamepass-game-hack PDF link annotation
    • http://fkunismuh.org/perpustakaan/repository/coin-master-free_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/master-coin-hack-game_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/hack-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/coin-master-free-stuff_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/how-to-get-free-robux-no-human-verification-2021-pc_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/robux-for-kids_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/coin-master-hacks-for-free-spins_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/coin-master-free-coins-and-spins-link-today_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/coin-master-hack-tool_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/coin-master-free-stuff_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/visea-descargar-hack-roblox_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/bloxpage-free-robux_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/coin-master-332-apk-free-download_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/watch-videos-for-robux_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/how-to-get-more-robux-for-free_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/how-to-hack-peoples-roblox-accounts_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_off00005119.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5119 28136 bytes
SHA-256: 58c7b8565dd0d856359a672f09aaf0e7bc9f72cbcf3b351d97345e1ea15dd8a8
font_01_sfnt_off00008fd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FD2 18988 bytes
SHA-256: b54b463db0139a5b3fb0eaf111785c0efcb22dc88d7cca52b5cc32c474facb01

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