Malicious PDF — malware analysis report

Static analysis result for SHA-256 2332174a3c3c2bd1…

MALICIOUS

PDF

34.4 KB Created: 2021-07-03 23:55:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 14b53ca1e032c587414f64a94266854d SHA-1: 692463d79807667ee2f342ec7f89fe0a4405a70f SHA-256: 2332174a3c3c2bd1b1490ceefe5185e1405142f7c44313539c5b000d9b69f923
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple embedded links and visible text that lure users with promises of free virtual currency and game items, such as 'Free Robux'. The heuristic 'PDF_CAPTCHA_LINK_LURE' indicates invisible links pointing to CAPTCHA-themed lures, suggesting a phishing or scam operation. The primary malicious URL identified is http://netcdn.tw/app/431946152/free-robux-working-game-hack, which likely hosts a malicious payload or redirects to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Invisible PDF links to CAPTCHA-themed web lure high PDF_CAPTCHA_LINK_LURE
    PDF contains invisible clickable link annotations that point to a CAPTCHA/capcha-themed web path. This is a common phishing and ClickFix-style routing pattern: the PDF itself is inert, while the linked page performs the credential prompt or fake verification.
  • 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/431946152/free-robux-working-game-hack
    • http://fkunismuh.org/perpustakaan/repository/free-robux-generator-2021_GM431946152.pdf
    • http://fkunismuh.org/perpustakaan//repository/how-to-get-unlimited-xp-in-pokemon-go_GM1094591345.pdf
    • http://www.fkunismuh.org/perpustakaan/repository/www-rbxmaniac-com-free-robux_GM431946152.pdf
    • http://fkunismuh.org/perpustakaan/repository/how-to-get-free-robux-without-surveys_GM431946152.pdf
    • http://fkunismuh.org/perpustakaan//repository/how-to-get-free-roblox_GM431946152.pdf
    • http://www.fkunismuh.org/perpustakaan/repository/daily-coin-master-free-spins_GM406889139.pdf
    • http://fkunismuh.org/perpustakaan//repository/how-to-get-free-roblox-gift-cards_GM431946152.pdf
    • http://fkunismuh.org/perpustakaan//repository/free-spins-for-coin-master-hack_GM406889139.pdf
    • http://www.fkunismuh.org/perpustakaan/repository/generator-robux_GM431946152.pdf
    • http://www.fkunismuh.org/perpustakaan/repository/free-robux-generator-no-survey-or-captcha_GM431946152.pdf
    • http://www.fkunismuh.org/perpustakaan/repository/roblox-apk-mod-hack-download_GM431946152.pdf
    • http://fkunismuh.org/perpustakaan/repository/free-spin-hack-coin-master-2021_GM406889139.pdf
    • http://fkunismuh.org/perpustakaan/repository/coin-master-hack-download-2021_GM406889139.pdf
    • http://www.fkunismuh.org/perpustakaan/repository/coin-master-fun-hack-online_GM406889139.pdf
    • http://www.fkunismuh.org/perpustakaan/repository/cheat-roblox-apres-la-dernire-mise--jour_GM431946152.pdf
    • http://www.fkunismuh.org/perpustakaan/repository/roblox-how-to-get-everything-free-in-the-catalog-2021_GM431946152.pdf
    • http://fkunismuh.org/perpustakaan//repository/free-robux-without-survey_GM431946152.pdf
    • http://www.fkunismuh.org/perpustakaan/repository/free-hair-on-roblox-for-girls_GM431946152.pdf
    • http://www.fkunismuh.org/perpustakaan/repository/robux-hacker-club_GM431946152.pdf
    • http://fkunismuh.org/perpustakaan//repository/free-robux-2021_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000313c.bin
736c13f1e5ee62885ebc6eef5f9ad8fd0fd65bb938c14089240b37750cfcc1f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x313C 21772 bytes
font_01_sfnt_off00006122.bin
ce738487085ad599441484df9d90a1a143049edc5affa9a85a5d558c4f13480e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6122 19204 bytes

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