Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d1cf9c640f76853…

MALICIOUS

PDF

35.6 KB Created: 2021-07-03 12:27:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 5baf725cbc5805f12eab9b5dc2e315ea SHA-1: d69d612c64d78f64f73df9a7a6dd3662baec8972 SHA-256: 1d1cf9c640f76853f6a2070209d35676aeccc078a1d1d575b6eec57bf01e5102
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/835599320/get-free-tiktok-followers-game-hack PDF link annotation
    • http://library.sdkmaterdei.sch.id/repository/roblox-for-free-on-phone_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/roblox-free-robux-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/free-minecraft-games-for-kids_GM479516143.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/put-cheat-codes-roblox_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/roblox-hack-no-survay_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/how-to-hack-robux-2021_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/best-roblox-hack-api_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/2021-robux-free_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/roblox-hack-konsol_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/hack-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/how-to-speed-hack-in-roblox-mobile_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/how-do-you-send-a-roblox-fottage-of-someone-hacking_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/roblox-secret-cheat-codes-for-music-steven-universe_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/how-to-hack-anyones-account-in-roblox_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/roblox-playerexe-free_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/free-roblox-loot-bags_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/captian-underpant-book-in-roblox-gives-you-free-robux_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/free-hair-roblox-code_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/roblox-infinite-jump-hack-download_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/how-to-hack-someones-roblox-account_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_off0000338f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x338F 23504 bytes
SHA-256: 3fe2a55b58b783e0fcb75a4e5f543ac2d0d7c339fb10971cb492545c22f1fd2f
font_01_sfnt_off000068e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68E7 18208 bytes
SHA-256: d6dc0fe96375bf479973c15f4dc80cb5149eb13cbf7121a6896fdf070428f5c7

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