Malicious PDF — malware analysis report

Static analysis result for SHA-256 172211943c3e31bc…

MALICIOUS

PDF

46.1 KB Created: 2021-05-12 03:33:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c6370d8bc87526f1bf6fb8322ff6a0f7 SHA-1: 9335fad0efbebddfcb216dad7659e7827fd3dac9 SHA-256: 172211943c3e31bc9a6dbc661c23fa8dde241a3a2e0b41b6ba9810d71dfc65ec
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. 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 0.9432

Heuristics 4

  • 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.
  • 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/real-free-robux-codes-game-hack PDF link annotation
    • http://elibrary.perludem.org//repository/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-o-get-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/games-like-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/free-robux-no-human-verification-generator_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-account-roblox-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-free-spins-daily-2021_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-download_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-free-coins--spins_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/minecraft-xbox-one-code-free_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/robux-online_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/50-000-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/get-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/doctor-louie-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/how-do-you-get-free-food-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/hack-crack-for-coin-master-currency_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-daily-rewards-link_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004ab8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AB8 25900 bytes
SHA-256: 088d95577b6818ae0b1c600a40d40e182d73e5be60cf5a9c991e0782fae890d7
font_01_sfnt_off0000870e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x870E 2928 bytes
SHA-256: d27ca7269cc665f7c566dcba71d1fcbd1348614b7b6242da2500f0713fcbc8bc
font_02_sfnt_off0000912d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x912D 18492 bytes
SHA-256: 6ff68d48ac5036b960fd78490347d8f271b820cb13d1967b9212c8abd8834c8c

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