Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec68059a94cd582c…

MALICIOUS

PDF

41.2 KB Created: 2021-05-16 04:31:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 28d57e52f26d20406abe234fae4b5d43 SHA-1: 48b48fb16e12b6fbe15d1bbf4add06221cced298 SHA-256: ec68059a94cd582c3cd6f3b251a12c7a2d757ee73b0013a7abe9f8614a0cb8da
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a fake-CAPTCHA lure. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • 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/moonactive-free-spins-coin-master-game-hack PDF link annotation
    • https://europe-upkl.eu/images/coin-master-daily-rewards-link_GM406889139.pdfIn PDF document text
    • https://europe-upkl.eu/images/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • https://europe-upkl.eu/images/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • https://europe-upkl.eu/images/free-private-server-roblox_GM431946152.pdfIn PDF document text
    • https://europe-upkl.eu/images/coin-master-free-spins-link-no-verification-code_GM406889139.pdfIn PDF document text
    • https://europe-upkl.eu/images/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • https://europe-upkl.eu/images/robux-com-roblox_GM431946152.pdfIn PDF document text
    • https://europe-upkl.eu/images/coin-master-free-spins-2021-link_GM406889139.pdfIn PDF document text
    • https://europe-upkl.eu/images/minecraft-free-exe_GM479516143.pdfIn PDF document text
    • https://europe-upkl.eu/images/free-robux-codes_GM431946152.pdfIn PDF document text
    • https://europe-upkl.eu/images/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://europe-upkl.eu/images/coin-master-link-spin_GM406889139.pdfIn PDF document text
    • https://europe-upkl.eu/images/roblox-hack-ios_GM431946152.pdfIn PDF document text
    • https://europe-upkl.eu/images/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • https://europe-upkl.eu/images/how-to-get-free-robux-without-downloading-apps-2021_GM431946152.pdfIn PDF document text
    • https://europe-upkl.eu/images/how-to-get-free-robux-no-scam_GM431946152.pdfIn PDF document text
    • https://europe-upkl.eu/images/rewards-roblox_GM431946152.pdfIn PDF document text
    • https://europe-upkl.eu/images/how-to-get-free-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • https://europe-upkl.eu/images/master-free-spin_GM406889139.pdfIn PDF document text
    • https://europe-upkl.eu/images/coin-master-free-coins--spins_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_003_off0000470c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x470C 24712 bytes
SHA-256: 6629967e838016b6e68fd4048b385f2670a1d164f07d42d1bdc36407cf91c21f
font_01_sfnt_off00007f8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F8B 18000 bytes
SHA-256: 525e065cc595701650099d1f547d5a2db26dd24a903bd4cc3081529fc79bef99

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