Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1f36fc9b382a04f…

MALICIOUS

PDF

35.2 KB Created: 2021-07-08 00:55:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 889fd71fdcda1a06bb78e419471c38bf SHA-1: 5ea90221f0c96528c87866abcad7bb15c24489be SHA-256: f1f36fc9b382a04f62c5c71e376ac68f38e9d1f1e81573ba969a339f5fad990e
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/hack-mod-coin-master-game-hack PDF link annotation
    • http://www.perpustakaan.unda.ac.id/repository/roblox-play-free-no-sign-in_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/new-this-number-glich-gets-free-robux_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/toolbox-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/robux-generator_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/collect-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/hack-coin-master-apk-2021_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/free-robux-generator-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/blogspot-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/i-will-hack-roblox-id_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/roblox-tix-generator_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/offers-for-robux_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/how-to-get-free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/how-to-hack-into-anyones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/coin-master-free-spins-link-today-instagram_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/rbx-place-free-robux_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/coin-master-free-spins-ios-app_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/free-posed-golden-ffreddy-roblox_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/tiktok-free-download-for-pc_GM835599320.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/roblox-cheat-menu_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/village-3-coin-master_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
font_00_sfnt_off0000343e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x343E 22768 bytes
SHA-256: f62a47b83c7d25209f4dd6817037a70c67207edcbcd5f9fd86b73554e110ee43
font_01_sfnt_off00006729.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6729 18180 bytes
SHA-256: 13378e678323b790d433bf8d14f0a0496d6eef813e33743c6f8064b3cc165312

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