Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f06a8d62397892f…

MALICIOUS

PDF

48.1 KB Created: 2021-06-11 10:34:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: cb4a6550e9ef5e3c05d1d64b9954c6cc SHA-1: 6c59d1ce91a785a3f63b87d749d3bd37d617b0db SHA-256: 7f06a8d62397892fbcd953faba81dc4af287f0d053ac85c0b18f2f821264343e
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript 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 and numerous other URLs found in the document body suggest a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and heuristics indicate it's designed to lead the user to download further malicious content.

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.tw/app/431946152/free-unicorn-code-roblox-2021-game-hack
    • http://perpustakaan.poltekom.ac.id/repository/aimbot-download-roblox_GM431946152.pdf
    • http://perpustakaan.poltekom.ac.id/repository/robux-hack-no-survey-2021_GM431946152.pdf
    • http://perpustakaan.poltekom.ac.id/repository/best-free-spin-app-for-coin-master_GM406889139.pdf
    • http://perpustakaan.poltekom.ac.id/repository/hack-robux_GM431946152.pdf
    • http://perpustakaan.poltekom.ac.id/repository/how-to-hack-cookie-clicker-roblox_GM431946152.pdf
    • http://perpustakaan.poltekom.ac.id/repository/pokemon-go-free-codes-2021_GM1094591345.pdf
    • http://perpustakaan.poltekom.ac.id/repository/500-free-coin-master-spins_GM406889139.pdf
    • http://perpustakaan.poltekom.ac.id/repository/coin-master-free-coins-and-spins-link_GM406889139.pdf
    • http://perpustakaan.poltekom.ac.id/repository/freespinandcoinblogspotcom-2021-11-coinmasterfreespinandcoinlinkshtml_GM406889139.pdf
    • http://perpustakaan.poltekom.ac.id/repository/roblox-free-draw-script_GM431946152.pdf
    • http://perpustakaan.poltekom.ac.id/repository/glitched-things-that-give-you-free-robux_GM431946152.pdf
    • http://perpustakaan.poltekom.ac.id/repository/blogspot-coin-master-free-spins_GM406889139.pdf
    • http://perpustakaan.poltekom.ac.id/repository/how-to-hack-someones-roblox-account_GM431946152.pdf
    • http://perpustakaan.poltekom.ac.id/repository/coin-master-pc-hack_GM406889139.pdf
    • http://perpustakaan.poltekom.ac.id/repository/www-coin-master-hack-tk_GM406889139.pdf
    • http://perpustakaan.poltekom.ac.id/repository/free-spins-in-coin-master-2021_GM406889139.pdf
    • http://perpustakaan.poltekom.ac.id/repository/roblox-games-that-give-you-free-robux_GM431946152.pdf
    • http://perpustakaan.poltekom.ac.id/repository/free-spins-coins-coin-master_GM406889139.pdf
    • http://perpustakaan.poltekom.ac.id/repository/roblox-hack-app_GM431946152.pdf
    • http://perpustakaan.poltekom.ac.id/repository/free-robux-no-downloading-apps_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005036.bin
7c028eace580d1f68f4a0f3fe65869ded23d65709e36ab8f7fe2f309ec8a337f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5036 27140 bytes
font_01_sfnt_off00008dd6.bin
5a38050e56bfed6ba013c4835499ae05f4b57b22e606c9172dd4bc2ae7fd1207		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DD6 2872 bytes
font_02_sfnt_off00009792.bin
81db9b84d1dc7254b30e388aa4f6e712745189b34338d848a972630cfdd1d559		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9792 18828 bytes

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