Malicious PDF — malware analysis report

Static analysis result for SHA-256 efa57301d8c78a3b…

MALICIOUS

PDF

42.8 KB Created: 2021-05-13 17:02:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 3a5ea12f35bd3e349a95b41d139872ee SHA-1: a1401b22a6c098889bec0ae57d7eac033b1a2b78 SHA-256: efa57301d8c78a3b737362eba73c58e702b1186a72d50c942aa4d2f01b06e094
82 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA or human verification prompt to trick the user into clicking a link. This link, specifically 'https://netcdn.xyz/app/406889139/hack-coin-master-online-game-hack', likely leads to the download of a malicious payload. The ML classifier also strongly indicated maliciousness.

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/hack-coin-master-online-game-hack
    • http://perpus.iainkediri.ac.id/pasca/repository/free-robux-no-verification-required_GM431946152.pdf
    • http://perpus.iainkediri.ac.id/pasca/repository/coin-master-apk-hack-2021-ios_GM406889139.pdf
    • http://perpus.iainkediri.ac.id/pasca/repository/how-to-host-a-minecraft-server-for-free_GM479516143.pdf
    • http://perpus.iainkediri.ac.id/pasca/repository/coin-master-game-hack-version-download_GM406889139.pdf
    • http://perpus.iainkediri.ac.id/pasca/repository/free-coin-master-spin-app_GM406889139.pdf
    • http://perpus.iainkediri.ac.id/pasca/repository/coin-master-free-spins-promo-code_GM406889139.pdf
    • http://perpus.iainkediri.ac.id/pasca/repository/get-robux-for-free-2021_GM431946152.pdf
    • http://perpus.iainkediri.ac.id/pasca/repository/coin-master-hack-no-human-verification-2021_GM406889139.pdf
    • http://perpus.iainkediri.ac.id/pasca/repository/minecraft-bedrock-hacks_GM479516143.pdf
    • http://perpus.iainkediri.ac.id/pasca/repository/coin-master-free-spins-2021-generator_GM406889139.pdf
    • http://perpus.iainkediri.ac.id/pasca/repository/haktuts-coin-master-free-daily-spins_GM406889139.pdf
    • http://perpus.iainkediri.ac.id/pasca/repository/how-to-get-free-robux-not-a-scam_GM431946152.pdf
    • http://perpus.iainkediri.ac.id/pasca/repository/free-cheat-codes-for-coin-master_GM406889139.pdf
    • http://perpus.iainkediri.ac.id/pasca/repository/free-minecraft-texture-packs_GM479516143.pdf
    • http://perpus.iainkediri.ac.id/pasca/repository/minecraft-18-9-hacked-client_GM479516143.pdf
    • http://perpus.iainkediri.ac.id/pasca/repository/free-robux-no-offers_GM431946152.pdf
    • http://perpus.iainkediri.ac.id/pasca/repository/free-spins-for-coin-master-hack_GM406889139.pdf
    • http://perpus.iainkediri.ac.id/pasca/repository/free-robux-instantly_GM431946152.pdf
    • http://perpus.iainkediri.ac.id/pasca/repository/download-hack-coin-master_GM406889139.pdf
    • http://perpus.iainkediri.ac.id/pasca/repository/free-coin-coin-master_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004ae8.bin
63ac4e53cb89ab9cfc76bffccfa405ddc7c81517a347a89e2fd56305a06ef681		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AE8 26048 bytes
font_01_sfnt_off00008681.bin
e0e539ae1db8c03a1be4e251235a7cd5530d910df9e974361113a9fde74a9cf4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8681 17788 bytes

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