Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e807273f6b6e9f3…

MALICIOUS

PDF

44.1 KB Created: 2021-05-15 09:21:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 0b8075d388b07d2b18c77b27f13d12c8 SHA-1: daaeed26da928b472422097d46b16e8c75a61b14 SHA-256: 7e807273f6b6e9f39b26e963187db95516571891be937ff9ec9c3317acac64a4
82 Risk Score

Malware Insights

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

The sample is a PDF document that exhibits characteristics of a social engineering lure. It displays a fake CAPTCHA or human verification prompt, a common tactic to trick users into interacting with malicious content. The document also contains an embedded URI pointing to a URL that is likely part of a scam or malware distribution. No scripts were extracted, but the presence of a fake CAPTCHA and a malicious URI strongly suggests an attempt to deceive the user into clicking the link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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.xyz/app/406889139/how-to-get-more-free-coins-on-coin-master-game-hack
    • https://kultura.orb.ru/uploads/ckfinder/userfiles/files/best-site-for-free-coin-master_GM406889139.pdf
    • https://kultura.orb.ru/uploads/ckfinder/userfiles/files/demon-roblox_GM431946152.pdf
    • https://kultura.orb.ru/uploads/ckfinder/userfiles/files/free-robux-card-codes_GM431946152.pdf
    • https://kultura.orb.ru/uploads/ckfinder/userfiles/files/coin-master-2021_GM406889139.pdf
    • https://kultura.orb.ru/uploads/ckfinder/userfiles/files/free-robux-com-no-verification_GM431946152.pdf
    • https://kultura.orb.ru/uploads/ckfinder/userfiles/files/how-to-get-free-robux-for-kids_GM431946152.pdf
    • https://kultura.orb.ru/uploads/ckfinder/userfiles/files/coin-master-free-codes_GM406889139.pdf
    • https://kultura.orb.ru/uploads/ckfinder/userfiles/files/earn-robux-today_GM431946152.pdf
    • https://kultura.orb.ru/uploads/ckfinder/userfiles/files/best-free-hacked-client_GM479516143.pdf
    • https://kultura.orb.ru/uploads/ckfinder/userfiles/files/how-to-hack-coin-master-root_GM406889139.pdf
    • https://kultura.orb.ru/uploads/ckfinder/userfiles/files/minecraft-pe-free-download-ios_GM479516143.pdf
    • https://kultura.orb.ru/uploads/ckfinder/userfiles/files/coin-master-hack-blogspot_GM406889139.pdf
    • https://kultura.orb.ru/uploads/ckfinder/userfiles/files/daily-coin-master-free-spins_GM406889139.pdf
    • https://kultura.orb.ru/uploads/ckfinder/userfiles/files/actual-free-robux_GM431946152.pdf
    • https://kultura.orb.ru/uploads/ckfinder/userfiles/files/free-robux-hack-2021_GM431946152.pdf
    • https://kultura.orb.ru/uploads/ckfinder/userfiles/files/free-robux-without-offers_GM431946152.pdf
    • https://kultura.orb.ru/uploads/ckfinder/userfiles/files/codes-to-get-free-robux_GM431946152.pdf
    • https://kultura.orb.ru/uploads/ckfinder/userfiles/files/minecraft-pocket-edition-download-free-pe-calculator_GM479516143.pdf
    • https://kultura.orb.ru/uploads/ckfinder/userfiles/files/free-robux-images_GM431946152.pdf
    • https://kultura.orb.ru/uploads/ckfinder/userfiles/files/how-to-download-minecraft-hacks_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004e4d.bin
f810be549afa0aaabf27e70ca88a2d54a7115910ad494344b3e0e80ecb4e416d
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E4D 26812 bytes
font_01_sfnt_off00008b90.bin
73b45e218274b6fbec23894575b4e000a8847b8f387ad102a3b5957b324b85f8
pdf-font-stream PDF embedded font (sfnt) at offset 0x8B90 17872 bytes