Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8ffcc11fc2908fa…

MALICIOUS

PDF

43.1 KB Created: 2021-05-15 07:33:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: d6ac6339afff54310eff35f2e2489f97 SHA-1: c05951162bbaf60826b90cdeb0e4fe72206e3b64 SHA-256: e8ffcc11fc2908faf96233644717c7dc3e46e5acca21ab6928eecf379c159fa5
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF document contains a fake CAPTCHA lure, aiming to trick users into clicking an embedded URL. The ML classifier strongly flagged this PDF as malicious. The embedded URL, https://netcdn.xyz/app/431946152/how-to-get-free-robux-no-human-verification-2021-game-hack, likely leads to a second-stage download or exploit.

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/431946152/how-to-get-free-robux-no-human-verification-2021-game-hack
    • http://abletrustcare.com/images/coin-master-free-stuff_GM406889139.pdf
    • http://abletrustcare.com/images/javascript-free-robux_GM431946152.pdf
    • http://abletrustcare.com/images/coin-master-online-hack-no-survey-no-password_GM406889139.pdf
    • http://abletrustcare.com/images/free-robux-generator-com-roblox-hack_GM431946152.pdf
    • http://abletrustcare.com/images/coin-master-game-free-download_GM406889139.pdf
    • http://abletrustcare.com/images/coin-master-hack-mod_GM406889139.pdf
    • http://abletrustcare.com/images/is-it-possible-to-get-free-robux_GM431946152.pdf
    • http://abletrustcare.com/images/how-to-get-free-robux-without-any-verification_GM431946152.pdf
    • http://abletrustcare.com/images/free-robux-group-payouts_GM431946152.pdf
    • http://abletrustcare.com/images/hack-robux_GM431946152.pdf
    • http://abletrustcare.com/images/coin-master-free-spins-link-hack_GM406889139.pdf
    • http://abletrustcare.com/images/coin-master-apk-hack-2021-ios_GM406889139.pdf
    • http://abletrustcare.com/images/coin-master-cards-free-cards_GM406889139.pdf
    • http://abletrustcare.com/images/free-robux-group_GM431946152.pdf
    • http://abletrustcare.com/images/free-coin-master-spins-and-coins_GM406889139.pdf
    • http://abletrustcare.com/images/roblox-hack-com_GM431946152.pdf
    • http://abletrustcare.com/images/free-robux-generator-for-roblox-2021_GM431946152.pdf
    • http://abletrustcare.com/images/how-to-get-free-coins-in-coin-master_GM406889139.pdf
    • http://abletrustcare.com/images/coinmasterfreespins_GM406889139.pdf
    • http://abletrustcare.com/images/free-robux-master_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004936.bin
2d26ab745edb9ddaf737f55c06ceaa6266d0c111b2b06d6648419188594bd36d		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4936 24916 bytes
font_01_sfnt_off000082ae.bin
dc7c459a90b1a398d2ee51f52972ed8a07904c77cd045887558a99bdb9823e3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82AE 19428 bytes

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