Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2f7135abd5690d7…

MALICIOUS

PDF

35.4 KB Created: 2021-07-06 02:01:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: c6993307374718f905288033832a06e6 SHA-1: e5db535e507d05b995cee36781f3da370e72c707 SHA-256: c2f7135abd5690d78a287d4014256a3517a251ce571063f4e76f378b212d5cc8
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document presents a fake CAPTCHA and a call-to-action to trick users into clicking a link for 'Free Robux'. The embedded URL points to a suspicious domain that likely hosts a malicious payload or phishing page. While no scripts were explicitly extracted, the PDF structure and heuristics suggest an attempt to exploit user interaction for malicious purposes, potentially leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/free-robux-no-survey-game-hack
    • http://alazhar-university.ac.id/aplikasi/perpustakaan/repository/bloxpage-free-robux_GM431946152.pdf
    • http://alazhar-university.ac.id/aplikasi/perpustakaan/repository/real-robux-codes_GM431946152.pdf
    • http://alazhar-university.ac.id/aplikasi/perpustakaan/repository/coin-master-free-spins-link-2021_GM406889139.pdf
    • http://alazhar-university.ac.id/aplikasi/perpustakaan/repository/coin-master-free-spins-link-blogspot_GM406889139.pdf
    • http://alazhar-university.ac.id/aplikasi/perpustakaan/repository/how-to-hack-all-faces-in-roblox_GM431946152.pdf
    • http://alazhar-university.ac.id/aplikasi/perpustakaan/repository/free-robux-only-username-no-human-verification_GM431946152.pdf
    • http://alazhar-university.ac.id/aplikasi/perpustakaan/repository/coin-master-hack-without-verification-code_GM406889139.pdf
    • http://alazhar-university.ac.id/aplikasi/perpustakaan/repository/robux-free-co_GM431946152.pdf
    • http://alazhar-university.ac.id/aplikasi/perpustakaan/repository/easy-coin-master-hack_GM406889139.pdf
    • http://alazhar-university.ac.id/aplikasi/perpustakaan/repository/password-free-roblox-accounts_GM431946152.pdf
    • http://alazhar-university.ac.id/aplikasi/perpustakaan/repository/free-robux-com-no-verification_GM431946152.pdf
    • http://alazhar-university.ac.id/aplikasi/perpustakaan/repository/coin-master-free-spins-link-today-instagram_GM406889139.pdf
    • http://alazhar-university.ac.id/aplikasi/perpustakaan/repository/free-robux-live_GM431946152.pdf
    • http://alazhar-university.ac.id/aplikasi/perpustakaan/repository/minecraft-windows-10-free_GM479516143.pdf
    • http://alazhar-university.ac.id/aplikasi/perpustakaan/repository/coin-master-shield-hack_GM406889139.pdf
    • http://alazhar-university.ac.id/aplikasi/perpustakaan/repository/robloxmatchcom-free-robux_GM431946152.pdf
    • http://alazhar-university.ac.id/aplikasi/perpustakaan/repository/roblox-hack-codes_GM431946152.pdf
    • http://alazhar-university.ac.id/aplikasi/perpustakaan/repository/rbxoffers-com-free-robux_GM431946152.pdf
    • http://alazhar-university.ac.id/aplikasi/perpustakaan/repository/coin-master-twitter-free-spins_GM406889139.pdf
    • http://alazhar-university.ac.id/aplikasi/perpustakaan/repository/best-way-to-get-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000343e.bin
3470dc8cc7b27766b7ef42ba93e5924441e6e3adcc2a319f1a610e599e2d83a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x343E 22180 bytes
font_01_sfnt_off00006569.bin
4e4ee538de79ec7e4a2325d57c934275716f5f92a64f1321ae55620a5fe6760f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6569 19012 bytes

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