Malicious PDF — malware analysis report

Static analysis result for SHA-256 45336d5fc17c07a1…

MALICIOUS

PDF

44.1 KB Created: 2021-06-03 14:26:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 88261255e7009b069d7b6a175ff3c5c5 SHA-1: 328c910513a4504a94e5b3d99e243ec54dc630ef SHA-256: 45336d5fc17c07a1848c7a3d457463ca6f9971b556bafe966d242132994b3f4f
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The document presents a fake CAPTCHA to trick users into clicking a link, which is a common social engineering tactic. The embedded URL, https://netcdn.online/app/479516143/how-to-get-minecraft-coins-for-free-game-hack, likely leads to a second-stage payload download. While no scripts were directly extracted, the PDF structure and heuristics suggest exploitation for client execution, potentially involving JavaScript.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/479516143/how-to-get-minecraft-coins-for-free-game-hack
    • http://perpus.unpam.ac.id/repository/how-to-hack-someone-on-roblox_GM431946152.pdf
    • http://perpus.unpam.ac.id/repository/20210-robux-for-free_GM431946152.pdf
    • http://perpus.unpam.ac.id/repository/coin-master-official-page_GM406889139.pdf
    • http://perpus.unpam.ac.id/repository/free-coins-2021-coin-master-link_GM406889139.pdf
    • http://perpus.unpam.ac.id/repository/free-robux-generator-no-human-verification_GM431946152.pdf
    • http://perpus.unpam.ac.id/repository/roblox-hack-download-pc_GM431946152.pdf
    • http://perpus.unpam.ac.id/repository/what-games-give-you-robux_GM431946152.pdf
    • http://perpus.unpam.ac.id/repository/coin-master-free-spin-redeem-code_GM406889139.pdf
    • http://perpus.unpam.ac.id/repository/free-spins-coin-master-ios-2021_GM406889139.pdf
    • http://perpus.unpam.ac.id/repository/coin-master-free-cards-link_GM406889139.pdf
    • http://perpus.unpam.ac.id/repository/free-robux-no-generator_GM431946152.pdf
    • http://perpus.unpam.ac.id/repository/free-robux-games_GM431946152.pdf
    • http://perpus.unpam.ac.id/repository/free-coin-master-spins-for-today_GM406889139.pdf
    • http://perpus.unpam.ac.id/repository/minecraft-windows-10-mod-menu_GM479516143.pdf
    • http://perpus.unpam.ac.id/repository/hack-coin-master-app_GM406889139.pdf
    • http://perpus.unpam.ac.id/repository/how-to-hack-people-on-roblox_GM431946152.pdf
    • http://perpus.unpam.ac.id/repository/25-free-spins-coin-master_GM406889139.pdf
    • http://perpus.unpam.ac.id/repository/download-coin-master-hack-apk_GM406889139.pdf
    • http://perpus.unpam.ac.id/repository/free-roblox-adopt-me-accounts_GM431946152.pdf
    • http://perpus.unpam.ac.id/repository/coin-master-links-for-today_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000529d.bin
be76f2a13f0054e23e236f8d38603311af866534ed6547d6c000f092edff8cf7		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x529D 24740 bytes
font_01_sfnt_off00008aef.bin
0037a1fc045e764a0a06593ed58f76bf502c93e6708a03a1db6b693a2071c675		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AEF 17872 bytes

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