Malicious PDF — malware analysis report

Static analysis result for SHA-256 567f8711c28cde9c…

MALICIOUS

PDF

47.9 KB Created: 2021-06-03 06:12:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 8d59001e919bd8ab204c5e6d983a588c SHA-1: 7df55abad34258bcd145c1b2575b8bee782ba86a SHA-256: 567f8711c28cde9ce94be1e2cb69a9560eca385cc18a1d3328885ab2a52f3a6d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a fake CAPTCHA lure, designed to trick users into performing an action. It also embeds external URIs pointing to potentially malicious content, suggesting an attempt to download a second-stage payload. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 4

  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/robuxglobalcom-game-hack
    • http://www.pustaka.pn-calang.go.id/repository/free-robux-games-that-actually-work_GM431946152.pdf
    • http://www.pustaka.pn-calang.go.id/repository/mcpe-master-unlimited-coins-hack-apk_GM406889139.pdf
    • http://www.pustaka.pn-calang.go.id/repository/moonactive-coin-master-free-spins_GM406889139.pdf
    • http://pustaka.pn-calang.go.id/repository/coin-master-free-spin-and-coin-links_GM406889139.pdf
    • http://www.pustaka.pn-calang.go.id/repository/coin-master-free-spins-8-14-2021_GM406889139.pdf
    • http://www.pustaka.pn-calang.go.id/repository/free-robux-download_GM431946152.pdf
    • http://www.pustaka.pn-calang.go.id/repository/coin-master-daily-free-spins-hack_GM406889139.pdf
    • http://www.pustaka.pn-calang.go.id/repository/minecraft-hacks-115-2_GM479516143.pdf
    • http://www.pustaka.pn-calang.go.id/repository/how-to-hack-coin-master-apple_GM406889139.pdf
    • http://www.pustaka.pn-calang.go.id/repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdf
    • http://pustaka.pn-calang.go.id/repository/free-robux-giveaway_GM431946152.pdf
    • http://www.pustaka.pn-calang.go.id/repository/how-to-get-minecraft-windows-10-for-free_GM479516143.pdf
    • http://www.pustaka.pn-calang.go.id/repository/coin-master-free-spins-link-blogspot-today_GM406889139.pdf
    • http://www.pustaka.pn-calang.go.id/repository/coin-master-free-spin-link-today-2021_GM406889139.pdf
    • http://www.pustaka.pn-calang.go.id/repository/coin-master-free-daily-spins-today_GM406889139.pdf
    • http://www.pustaka.pn-calang.go.id/repository/free-roblox-account-generator_GM431946152.pdf
    • http://www.pustaka.pn-calang.go.id/repository/how-to-play-minecraft-online-for-free_GM479516143.pdf
    • http://www.pustaka.pn-calang.go.id/repository/coin-master-free-spins-hack-iphone_GM406889139.pdf
    • http://pustaka.pn-calang.go.id/repository/free-robux-easy_GM431946152.pdf
    • http://www.pustaka.pn-calang.go.id/repository/free-minecraft-realm-codes_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005192.bin
5c6d3809a488b675dbf2cc334445bd9fd95f0f40f00ec4cb300f2ddd45e38905		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5192 25244 bytes
font_01_sfnt_off00008a84.bin
64ea6bfd232c3abde76d8b86727203bfa3f935a5783cd0c1f642cf6d3fb42b29		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A84 3884 bytes
font_02_sfnt_off0000972c.bin
d5d380c14b1c3533a6c9fc17386668f4f695dbb5a72804d4b15c93cba3cce598		 pdf-font-stream PDF embedded font (sfnt) at offset 0x972C 18700 bytes

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