Malicious PDF — malware analysis report

Static analysis result for SHA-256 48a100974e10e643…

MALICIOUS

PDF

34.8 KB Created: 2021-07-05 17:41:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 557bf3a3079501f217b453a3f926fc84 SHA-1: 91b3029de094a0b9aaf4c20e3a9ceb72fc8e04f9 SHA-256: 48a100974e10e643d3d5f1d5661ee31a69d1306a8164da34111a6493a5269ae5
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/479516143/minecraft-free-download-windows-game-hack PDF link annotation
    • https://library.stikesmi.ac.id/repository/roblox-free-login_GM431946152.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/coin-master-free-spins-2021-generator_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/coin-master-hack-ios-apk_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/free-robux-place_GM431946152.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/coin-master-guide-to-free-spins-and-rewards_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/minecraft-pe-hack-client-2021_GM479516143.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/coin-master-heaven-free-spins_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/free-robux-no-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/free-roblox-codes-2021_GM431946152.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/free-spin-coin-master-iphone_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/how-to-gift-robux-on-mobile_GM431946152.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/expensive-avatar-for-free-roblox_GM431946152.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/free-spins-and-coins-coin-master-links_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/coin-master-32-hack-apk-download_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/minecraft-java-edition-free-trial_GM479516143.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/minecraft-java-edition-key-free_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
font_00_sfnt_off0000319d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x319D 23020 bytes
SHA-256: 19c3f248993ed931f50451a6ef7d0e5d5f7694170be856600dfd68b67552c3dc
font_01_sfnt_off000063fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63FC 18776 bytes
SHA-256: 1816d41857fafb62710145750044d0772271d156c0c542d24f261faa84011891

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