Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f9539ac842b5278…

MALICIOUS

PDF

34.9 KB Created: 2021-07-06 03:00:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: cb3c51f88ebd7c2cbe06099e2207b974 SHA-1: aa3ac2bf7aab9563bc733f20897262a5da3a43d5 SHA-256: 0f9539ac842b52784ae4b9a1962bc59103bce45fa83e0e1d48ccd46b9b4c9ede
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 0.9980

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 http://netcdn.tw/app/406889139/app-master-game-hack PDF link annotation
    • http://perpus.ftunismabekasi.ac.id/repository/how-to-use-python-for-hacking-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/free-spin-coin-master-online_GM406889139.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/how-to-free-clothes-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/tiktok-likes-for-free_GM835599320.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/is-esp-roblox-hack_GM431946152.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/robux-hack-po-polsku_GM431946152.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/spin-link_GM406889139.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/how-to-get-minecraft-for-free-on-xbox-one_GM479516143.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/https-oprewards-com-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/free-admin-roblox-download_GM431946152.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/free-robux-site-cashforapps_GM431946152.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/minecraft-hax-download-no-virus_GM479516143.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/cool-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/hack-de-cuentas-de-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/free-robux-simple-app_GM431946152.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/how-to-get-free-holiday-crown-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/free-female-faces-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/baby-hacks-in-adopt-and-raise-a-baby-in-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/free-robux-just-enter-username_GM431946152.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_002_off0000324f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x324F 23396 bytes
SHA-256: 02cde6041de59f1f068e22c0036df6bf261dacbff8d7d841800bdc38fdd048cf
font_01_sfnt_off0000673e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x673E 17748 bytes
SHA-256: 7f35764ca496769aa6fdbaf6c3111c97d2ec009e45c432c622fda67b674d07f4

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