Malicious PDF — malware analysis report

Static analysis result for SHA-256 21308e7dec0a0ba3…

MALICIOUS

PDF

44.9 KB Created: 2021-06-04 01:41:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 5a1b37ca6dd2d38358773af1bb387791 SHA-1: 75231d207c54b4d8f6fc93e5e6e98db7fdc8394d SHA-256: 21308e7dec0a0ba339497c8177342c5e417e0768d784c6c17ba1e857f048b122
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a fake CAPTCHA lure, a common social engineering tactic to trick users into interacting with malicious content. It also embeds external URIs, including one pointing to a Roblox exploit download, suggesting the document's purpose is to facilitate the download of potentially harmful software. No scripts were extracted from this sample, limiting the analysis of its execution behavior.

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/431946152/roblox-exploit-2021-free-game-hack
    • http://lib.smpn1bambanglipuro.sch.id/repository/free-minecraft-mods-for-xbox-one_GM479516143.pdf
    • http://lib.smpn1bambanglipuro.sch.id/repository/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdf
    • http://lib.smpn1bambanglipuro.sch.id/repository/roblox-robux-generator-tool_GM431946152.pdf
    • http://lib.smpn1bambanglipuro.sch.id/repository/roblox-avatar-maker-free_GM431946152.pdf
    • http://lib.smpn1bambanglipuro.sch.id/repository/coin-master-free-spins-save_GM406889139.pdf
    • http://lib.smpn1bambanglipuro.sch.id/repository/free-robux-generator-com-roblox-hack_GM431946152.pdf
    • http://lib.smpn1bambanglipuro.sch.id/repository/free-robux-survey_GM431946152.pdf
    • http://lib.smpn1bambanglipuro.sch.id/repository/apps-for-free-robux_GM431946152.pdf
    • http://lib.smpn1bambanglipuro.sch.id/repository/coin-master-hacks-that-actually-work_GM406889139.pdf
    • http://lib.smpn1bambanglipuro.sch.id/repository/how-to-hack-peoples-roblox-accounts_GM431946152.pdf
    • http://lib.smpn1bambanglipuro.sch.id/repository/how-to-get-more-robux_GM431946152.pdf
    • http://lib.smpn1bambanglipuro.sch.id/repository/kuso-icu-roblox-hack_GM431946152.pdf
    • http://lib.smpn1bambanglipuro.sch.id/repository/free-online-generator-for-coin-master_GM406889139.pdf
    • http://lib.smpn1bambanglipuro.sch.id/repository/free-robux-com-2021_GM431946152.pdf
    • http://lib.smpn1bambanglipuro.sch.id/repository/free-robux-no-verification-or-survey-2021_GM431946152.pdf
    • http://lib.smpn1bambanglipuro.sch.id/repository/coin-master-free-spin-realme-products_GM406889139.pdf
    • http://lib.smpn1bambanglipuro.sch.id/repository/coin-master-free-spins-link-today-new_GM406889139.pdf
    • http://lib.smpn1bambanglipuro.sch.id/repository/coin-master-spins_GM406889139.pdf
    • http://lib.smpn1bambanglipuro.sch.id/repository/synapse-roblox-free-download_GM431946152.pdf
    • http://lib.smpn1bambanglipuro.sch.id/repository/how-do-i-get-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000521f.bin
a7f35a59610cfbdaf93d919c0d78d3ac55fa77c60c950605843e5e4c3bad71c5		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x521F 25172 bytes
font_01_sfnt_off00008b55.bin
d4223874bba8e95de3b97da889919152cf1de095cb3bff60ee009a4e89b19754		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B55 18748 bytes

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