Malicious PDF — malware analysis report

Static analysis result for SHA-256 59ca4f26771a534b…

MALICIOUS

PDF

37.2 KB Created: 2021-07-05 15:59:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: d2ff28139b05a5b572cd67d630c40473 SHA-1: aa4693c5adb9fa0aca208868d87d835283395fbf SHA-256: 59ca4f26771a534b494dbad46ec458c3e4fc561a27c70a9dd8c93f032e77b436
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-cards-link-2021-today-game-hack PDF link annotation
    • http://e-library.stienobel-indonesia.ac.id/repository/free-minecraft-resource-packs_GM479516143.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/free-foxy-food-coin-master_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/coin-master-hack-apk-facebook-login_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/coin-master-free-stuff_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/free-robux-discord-servers_GM431946152.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/coin-master-free-spins-without-human-verification_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/roblox-assassin_GM431946152.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/game-give-free-robux_GM431946152.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/coin-master-free-pin_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/multiplayer-master-hack-coins_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/free-games-coin-master_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/free-spins-coin-master-app-ios_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/coin-master-in-app-purchase-hack_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/pubg-uc-at-cheap-price_GM1330123889.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/robux-codes_GM431946152.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/robuxglobalcom-no-verification_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_off000037a3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x37A3 23584 bytes
SHA-256: d73e3fe9acf90af1e9b1b437e1adbc69dabfce3a590d5cb899fb488a18e67d10
font_01_sfnt_off00006d09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D09 18924 bytes
SHA-256: 4325d22604c985801318a09856abb239b71478aaf8f7ce5bde155a72b560a462

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