Malicious PDF — malware analysis report

Static analysis result for SHA-256 db16613688d50729…

MALICIOUS

PDF

47.0 KB Created: 2021-06-08 09:49:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a66936005dd9248949242e02c6641e3d SHA-1: 0fff22cda4be47db24c59795a7ba88d7ab1d5655 SHA-256: db16613688d507291974b118aa85f909ed06bf2e137f38f5bad4792fed200af8
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 0.9832

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 https://netcdn.tw/app/431946152/how-to-hack-roblox-assassin-2021-game-hack PDF link annotation
    • http://perpus.masda.ac.id/repository/free-mods-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-sound-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-roblox-hair-boy_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-cheat-free_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-hack-spin-generator_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-robux-survey_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/tiktok-free-recharge-500_GM835599320.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-hack-apk-2021_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/links-for-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/hack-coin-master-apk-32_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/50-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/roblox-earn_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/can-you-give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/minecraft-story-mode-free-download_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-hack-apk-download-for-android-mobile_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/krnl-download_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/roblox-cheat-codes_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_004_off000051da.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51DA 28280 bytes
SHA-256: ecca4ae0192e40a7a936f95ba757d29177143ad43d43cfdb1a996c7202537510
font_01_sfnt_off0000932a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x932A 18868 bytes
SHA-256: 27858cf40f8870238b8526eaba59f930c9509ce32563c23f65daa53e9fe12875

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