Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8cbcf6d032ff65a…

MALICIOUS

PDF

41.9 KB Created: 2021-05-19 02:31:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 4c76c53e6a80ab6920181096d51decdf SHA-1: a148c5cd7a1b6c23517c319049f0fe328e7ceb64 SHA-256: c8cbcf6d032ff65ad52e06d4995eb32324c759a4f9c9d4868d4a61be87d331a9
82 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA lure, encouraging users to click a link to download a game hack. This is a common social engineering tactic to trick users into downloading malware. The embedded URI points to a suspicious URL, likely serving as the initial download source for a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/coin-master-fan-hack-game-hack
    • https://opac.umrah.ac.id/repository/free-daily-spins-coin-master-2021_GM406889139.pdf
    • https://opac.umrah.ac.id/repository/coin-master-pet-food-free_GM406889139.pdf
    • https://opac.umrah.ac.id/repository/coin-master-free-cards-link-2021-today_GM406889139.pdf
    • https://opac.umrah.ac.id/repository/rbxoffers-earn-free-robux_GM431946152.pdf
    • https://opac.umrah.ac.id/repository/how-to-hack-a-minecraft-server-and-make-yourself-op_GM479516143.pdf
    • https://opac.umrah.ac.id/repository/how-to-get-minecraft-for-free-2021_GM479516143.pdf
    • https://opac.umrah.ac.id/repository/coin-master-hack-without-human-verification-2021_GM406889139.pdf
    • https://opac.umrah.ac.id/repository/coin-master-invite-friends-free-spins_GM406889139.pdf
    • https://opac.umrah.ac.id/repository/free-robux-promo-codes-2021_GM431946152.pdf
    • https://opac.umrah.ac.id/repository/free-spins-coin-master-links_GM406889139.pdf
    • https://opac.umrah.ac.id/repository/robuxhub-net_GM431946152.pdf
    • https://opac.umrah.ac.id/repository/moonactive-coin-master-free-spins-link_GM406889139.pdf
    • https://opac.umrah.ac.id/repository/claim-free-robux_GM431946152.pdf
    • https://opac.umrah.ac.id/repository/how-do-i-get-free-robux-on-roblox_GM431946152.pdf
    • https://opac.umrah.ac.id/repository/minecraft-games-free-to-play-online_GM479516143.pdf
    • https://opac.umrah.ac.id/repository/how-to-make-roblox-clothes-for-free_GM431946152.pdf
    • https://opac.umrah.ac.id/repository/minecraft-pe-016-0-apk-download-free_GM479516143.pdf
    • https://opac.umrah.ac.id/repository/free-rewards-coin-master_GM406889139.pdf
    • https://opac.umrah.ac.id/repository/coin-master-free-spins-hack-download_GM406889139.pdf
    • https://opac.umrah.ac.id/repository/how-to-play-roblox-for-free_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004967.bin
7e36361e57c27b19755078b79a12ab5f6bf0d6e1e1b755af73d4b989fffcd68b		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4967 25036 bytes
font_01_sfnt_off000082cd.bin
9d1f455011f0aa7862855f259ab9ea2efa3be9ec050c3ec97e4c793879e57b5c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82CD 17880 bytes

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