Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c46247fdd94fd46…

MALICIOUS

PDF

41.5 KB Created: 2021-05-13 22:34:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 133bcb943b1442302e841840694860ea SHA-1: a82ad2f47090bae8000f16fff3e6f9bdb7120d46 SHA-256: 4c46247fdd94fd462d0c39dd0edd80a03bab493d705921da1d8bde36efa225fd
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document presents a fake CAPTCHA or human verification prompt to trick the user into clicking a link, which is a common social engineering tactic. The embedded URL and numerous other URLs point to sites offering game hacks and free in-game currency, reinforcing the lure. While no scripts were explicitly extracted, the PDF structure and heuristics suggest it's designed to lead the user to a malicious download or exploit. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/406889139/how-to-get-free-spins-and-coins-in-coin-master-game-hack
    • https://pn-tapaktuan.go.id/pustaka/repository/coin-master-rare-cards-hack_GM406889139.pdf
    • https://pn-tapaktuan.go.id/pustaka/repository/how-to-get-free-coins-in-coin-master_GM406889139.pdf
    • https://pn-tapaktuan.go.id/pustaka/repository/play-minecraft-pocket-edition-for-free_GM479516143.pdf
    • https://pn-tapaktuan.go.id/pustaka/repository/free-robux-without-survey_GM431946152.pdf
    • https://pn-tapaktuan.go.id/pustaka/repository/promo-codes-for-free-robux_GM431946152.pdf
    • https://pn-tapaktuan.go.id/pustaka/repository/minecraft-bedrock-server-hosting-free_GM479516143.pdf
    • https://pn-tapaktuan.go.id/pustaka/repository/coin-master-free-spins-hack-no-human-verification_GM406889139.pdf
    • https://pn-tapaktuan.go.id/pustaka/repository/coin-master-freebies-2021_GM406889139.pdf
    • https://pn-tapaktuan.go.id/pustaka/repository/rbx-roblox-robux_GM431946152.pdf
    • https://pn-tapaktuan.go.id/pustaka/repository/roblox-devil_GM431946152.pdf
    • https://pn-tapaktuan.go.id/pustaka/repository/sb-game-hacker-coin-master_GM406889139.pdf
    • https://pn-tapaktuan.go.id/pustaka/repository/roblox-script-hacks_GM431946152.pdf
    • https://pn-tapaktuan.go.id/pustaka/repository/how-to-get-free-robux-as-a-kid_GM431946152.pdf
    • https://pn-tapaktuan.go.id/pustaka/repository/download-hack-coin-master_GM406889139.pdf
    • https://pn-tapaktuan.go.id/pustaka/repository/how-to-use-scripts-in-roblox-hack_GM431946152.pdf
    • https://pn-tapaktuan.go.id/pustaka/repository/free-minecraft-wallpaper_GM479516143.pdf
    • https://pn-tapaktuan.go.id/pustaka/repository/can-you-get-free-robux-on-roblox_GM431946152.pdf
    • https://pn-tapaktuan.go.id/pustaka/repository/100-free-coin-master-spins_GM406889139.pdf
    • https://pn-tapaktuan.go.id/pustaka/repository/how-to-hack-people-on-roblox_GM431946152.pdf
    • https://pn-tapaktuan.go.id/pustaka/repository/coin-master-free-spins-link-2021-today_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000047e1.bin
1d615b9ef5a8f6466b2a7c2d5647cc0cac02c86c621660be412da09bc9319808		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47E1 24572 bytes
font_01_sfnt_off0000801e.bin
1a177d96c25f70e29c96d18ff08cc0e48255fbbd4539b1ca90a782c549603dc1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x801E 18224 bytes

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