Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2256b7191438666…

MALICIOUS

PDF

35.0 KB Created: 2021-07-05 16:00:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 723052842cc2410d8327d0e4563bf2d1 SHA-1: 16e4a006b7e534e3b7f6f297e3333fc3947ad46a SHA-256: c2256b7191438666fdc14e2046aa256ae71453126cbff90add9036c76c64e093
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-cheats-2021-game-hack PDF link annotation
    • http://lib.unar.ac.id//repository/coin-master-free-coins-generator_GM406889139.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/coin-master-free-spins-link-download-hack_GM406889139.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/minecraft-windows-free_GM479516143.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/roblox-booga-booga-fly-hack-may-26-2021_GM431946152.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/skin-for-roblox-free_GM431946152.pdfIn PDF document text
    • http://lib.unar.ac.id//repository/robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/descargar-coin-master-hackeado_GM406889139.pdfIn PDF document text
    • http://lib.unar.ac.id//repository/free-roblox-clothes-boy_GM431946152.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/noob-pro-hacker-roblox_GM431946152.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/minecraft-hacks-18-9_GM479516143.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/coin-master-free-spins-16-04-19_GM406889139.pdfIn PDF document text
    • http://lib.unar.ac.id//repository/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://lib.unar.ac.id//repository/best-tricks-co-robux_GM431946152.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/minecraft-apk-android-free_GM479516143.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/free-3d-models-for-roblox_GM431946152.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/generate-free-robux-for-roblox-on-any-device_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
font_00_sfnt_off000032f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32F2 22856 bytes
SHA-256: f4f47e147f81ce807f18e02b5face06878d886328a4befc60c0f2bff58914c47
font_01_sfnt_off000065d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65D1 18404 bytes
SHA-256: b84a6eff53f49c27ef2dd0e07956638ce86fcdd1a1510f2c693010b455af6b5b

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