Malicious PDF — malware analysis report

Static analysis result for SHA-256 8aade6cb928ba22a…

MALICIOUS

PDF

48.7 KB Created: 2021-06-03 19:28:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 7ec10152cee3ce5c0535cbc61aae46e2 SHA-1: eb5458344d85d6494d117257d283aeaaded01ae6 SHA-256: 8aade6cb928ba22aad77dfea70a3f824f12f4af2b64257316707f8127714a5ed
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The sample was flagged by an ML classifier and contains heuristics indicating a fake CAPTCHA or human verification prompt, designed to trick users into interacting with malicious links. The document body, though heavily obfuscated, contains text related to 'free Robux' and a URL pointing to a potential download. The presence of multiple embedded URLs suggests an attempt to redirect the user to a malicious site.

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.online/app/431946152/huskybuckscom-free-robux-game-hack
    • https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/roblox-free-robux-codes_GM431946152.pdf
    • https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/roblox-hacks-com_GM431946152.pdf
    • https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/free-coins-coin-master-2021_GM406889139.pdf
    • https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/how-to-get-free-roblox-hair_GM431946152.pdf
    • https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/free-robux-survey_GM431946152.pdf
    • https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/free-roblox-hair-girl_GM431946152.pdf
    • https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/coin-master-golden-cards-hack_GM406889139.pdf
    • https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/chisel-and-bits-mod-minecraft-pe_GM479516143.pdf
    • https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/coin-master-deals_GM406889139.pdf
    • https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/minecraft-hacked-client_GM479516143.pdf
    • https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/minecraft-the-complete-handbook-collection_GM479516143.pdf
    • https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/free-mod-apk-coin-master_GM406889139.pdf
    • https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/is-it-possible-to-get-free-robux_GM431946152.pdf
    • https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/earn-free-robux-on-roblox_GM431946152.pdf
    • https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/free-minecraft-alt-accounts_GM479516143.pdf
    • https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/bux-life-free-robux_GM431946152.pdf
    • https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/coin-master-apk-hack-mod-download_GM406889139.pdf
    • https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/windows-10-minecraft-hacks_GM479516143.pdf
    • https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/free-robux-script_GM431946152.pdf
    • https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/fighting-free-card-coin-master_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005450.bin
5d59986c06a19b5aee42a7ea0c9d6b50a44f19ca4525b05c94f2a70cb881af07		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5450 25404 bytes
font_01_sfnt_off00008d8d.bin
450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D8D 5696 bytes
font_02_sfnt_off00009a9e.bin
f893a3bff8774b7ed5d4e22eaab63b6b5727efd4274e33d815ecbde6c17ee355		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A9E 18624 bytes

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