Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b78e8e691713b7d…

MALICIOUS

PDF

34.9 KB Created: 2021-07-06 13:34:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 794ec790a84e4522e70bb3f107b437a5 SHA-1: 43e7e7c0bdcabf1777681206d9c8864ccfd41f4b SHA-256: 9b78e8e691713b7d9fe2f0956c414888b0c409ff6bbdbc819cdb903c6f190a6d
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/coin-master-free-coins-and-spins-daily-game-hack PDF link annotation
    • http://digilib.iailm.ac.id/repository/free-vip-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/robux-hack-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-card-collection-hack-2021_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/free-spins-coin-master-android_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/coin-master-apk-hack-2021-ios_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/robux-free-gift-card_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/how-to-change-your-speed-no-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/coin-master-hacks-iphone_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/how-to-get-free-robux-easy-download_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/minecraft-world-free-download_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/free-minecraft-accounts-2021_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/veorra-set-free-roblox-id_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/roblox-cbro-how-to-get-free-knife_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/minecraft-clipart-free_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/roblox-hack-ios_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/moonactive-free-spins-link_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/hack-master-coin_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/minecraft-free-version-pc_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_002_off00002faf.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2FAF 23320 bytes
SHA-256: f435a29970732531ff4d02513711f512ffe0b2f549b796ef269deb7aecc5bd0b
font_01_sfnt_off00006460.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6460 18772 bytes
SHA-256: 9a55712549d24f40bd9168c897c03b6f38d3aaf5d93578d14a86cb5737851a0c

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