Malicious PDF — malware analysis report

Static analysis result for SHA-256 20595c15131833e4…

MALICIOUS

PDF

35.2 KB Created: 2021-07-03 21:30:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 6da678dfbeb7a4e4acec953425f4ac28 SHA-1: 3dfe1e79386c57f926d6fbd6305cb0e6e82dbd15 SHA-256: 20595c15131833e4c229ff6b6572d5d044bde10bf44d5f0ed49f13913756b4b9
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-hack-cydia-game-hack PDF link annotation
    • http://elib.upiyptk.ac.id/opac/repository/get-free-minecraft-account_GM479516143.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/blogger-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/minecraft-116-apk-download_GM479516143.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/coin-master-hack-apk-with-fb-login_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/coin-master-new-cards-hack_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/swordpack-in-roblox-free_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/descargar-hack-para-hackear-cuentas-de-roblox-descargando-algo_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/coin-master-hack-2021-android-apk_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/minecraft-pe-free-download-ios-no-jailbreak_GM479516143.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/hack-coin-master-343-apk_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/how-to-get-free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/coin-master-hack-apk-2021-download_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/coinmaster-com_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/free-minecraft-gift-codes_GM479516143.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/coin-master-free-spins-uk_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/how-to-host-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/get-free-robux_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/doctor-louie-roblox_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/free-spin-coin-master-apk_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
stream_002_off0000327b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x327B 23152 bytes
SHA-256: bb66cf6eae853b38a6e791460296dfb821268ec154a69ee6525930ccfd6a2550
font_01_sfnt_off000066c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66C3 18356 bytes
SHA-256: c1ae93ae19acdde747f9b30a7c27420f2058cd5987fc5615fdc11fefbec34302

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