Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bb969a506d0f74a…

MALICIOUS

PDF

42.3 KB Created: 2021-05-19 02:31:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: e09dd806693fe68085ae403d66938466 SHA-1: d9e69419c8d147b5fef02d650a26f60d4833e242 SHA-256: 3bb969a506d0f74ac66ae42d5fbe3454b1349ebdac8d4adf5a96d012a44a1127
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 0.9971

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/406889139/coin-master-hack-spins-ios-game-hack PDF link annotation
    • https://lib.stie-yai.ac.id/repository/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/roblox-hack_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/minecraft-xbox-one-free_GM479516143.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/get-free-spins-link-in-coin-master_GM406889139.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/roblox-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-robux-generator_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/get-me-robux-for-free_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/app-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/is-minecraft-free-on-switch_GM479516143.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/how-to-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/coin-master-hacks-for-iphone_GM406889139.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-robux-download_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/best-tricks-co-robux_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-robux-2021_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/roblox-hack-download_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-robux-hack-generator_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_003_off00004a87.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A87 24892 bytes
SHA-256: 458bbb14fa2daf581df4ddbdafd7e637665f2451890d4a84cb9f3fc649c385ab
font_01_sfnt_off00008422.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8422 17892 bytes
SHA-256: 8a2199a6fb9e6551992738fdb7d2625a8f143b5a9fef4499610b6e02eb0e5450

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