Malicious PDF — malware analysis report

Static analysis result for SHA-256 2df629e70856e042…

MALICIOUS

PDF

41.6 KB Created: 2021-05-16 12:36:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 49d93094f59c8e543bfa74edeb4c9d53 SHA-1: d2c510e0236d9b2d4ceebd77232b342c1732c2ff SHA-256: 2df629e70856e042e2f106d52cec215d3a3e79bc8515fa08d29964b2cbb9e387
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/open-coin-master-game-hack PDF link annotation
    • http://kulturlandschaften.eu/images/minecraft-switch-free_GM479516143.pdfIn PDF document text
    • http://kulturlandschaften.eu/images/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://kulturlandschaften.eu/images/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://kulturlandschaften.eu/images/windows-10-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://kulturlandschaften.eu/images/roblox-but_GM431946152.pdfIn PDF document text
    • http://kulturlandschaften.eu/images/coin-master-free-stuff_GM406889139.pdfIn PDF document text
    • http://kulturlandschaften.eu/images/coin-master-hacks-for-free-spins_GM406889139.pdfIn PDF document text
    • http://kulturlandschaften.eu/images/roblox-redeem-robux_GM431946152.pdfIn PDF document text
    • http://kulturlandschaften.eu/images/how-to-get-free-robux-without-surveys_GM431946152.pdfIn PDF document text
    • http://kulturlandschaften.eu/images/how-to-hack-coin-master-android_GM406889139.pdfIn PDF document text
    • http://kulturlandschaften.eu/images/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://kulturlandschaften.eu/images/minecraft-for-macbook-free_GM479516143.pdfIn PDF document text
    • http://kulturlandschaften.eu/images/coin-master-daily-rewards-link_GM406889139.pdfIn PDF document text
    • http://kulturlandschaften.eu/images/coin-master-hack_GM406889139.pdfIn PDF document text
    • http://kulturlandschaften.eu/images/hack-roblox-players_GM431946152.pdfIn PDF document text
    • http://kulturlandschaften.eu/images/free-minecraft-realm-codes_GM479516143.pdfIn PDF document text
    • http://kulturlandschaften.eu/images/coin-master-mod-apk-free-download-for-android_GM406889139.pdfIn PDF document text
    • http://kulturlandschaften.eu/images/minecraft-java-edition-download-free_GM479516143.pdfIn PDF document text
    • http://kulturlandschaften.eu/images/clients-minecraft_GM479516143.pdfIn PDF document text
    • http://kulturlandschaften.eu/images/minecraft-free-apk-download-016-0_GM479516143.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_off0000492b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x492B 25436 bytes
SHA-256: e7e2a4e92a7f2179802c86ef8f8c2a7e7c8640d0712980217c571bc9c2f48dd5
font_01_sfnt_off000081ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81CE 17724 bytes
SHA-256: 50fa6083fcbea3c37b42e9adc6f7c49d783d65341cfa8b80ae78b0fdb62cf2e6

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