Malicious PDF — malware analysis report

Static analysis result for SHA-256 794761b8869c0805…

MALICIOUS

PDF

43.0 KB Created: 2021-06-03 07:26:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 9b9d0a232a1b26c59339c93726c96348 SHA-1: 95216d88e6fccf7f26955a9e8b97d58c9df721d4 SHA-256: 794761b8869c08059af1cd231c3b83546e5b189b5e936732e47b7f1d1efcd137
82 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure, aiming to trick users into downloading a file from the provided URL. The document body and embedded URLs suggest a scam related to in-game currency or cheats. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lure indicate a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9874

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/406889139/free-coin-master-coins-2021-game-hack PDF link annotation
    • https://perpustakaan.itda.ac.id/repository/free-coins-and-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-games-coin-master_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/tiktok-free-hearts-hack_GM835599320.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/www-coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/mcpe-optifine_GM479516143.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/moon-active_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/minecraft-ps4-code-free_GM479516143.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/coin-master-extra-spins_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/how-to-make-a-private-server-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/roblox-hacks-and-cheats_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/boku-no-roblox-hack_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/how-to-get-minecraft-bedrock-for-free-with-java_GM479516143.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/instantrobux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/coin-master-apk-mod_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-spin-and-coin-blogspot_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/minecraft-life-hacks_GM479516143.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/minecraft-modded-client_GM479516143.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/coin-master-free-food_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004e72.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E72 24336 bytes
SHA-256: 03bd29105e3960090f1b5d399c2879ea52f08434b9a6878d1c3bdc41d855b9ac
font_01_sfnt_off00008601.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8601 18112 bytes
SHA-256: b90a52bb7a513cac6c35a142a2cc06d16f7dce6089e69086c8d165c3db595bed

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