Malicious PDF — malware analysis report

Static analysis result for SHA-256 c126a72a6ab67545…

MALICIOUS

PDF

34.2 KB Created: 2021-07-03 12:46:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 7d443bc9bb5f877b972b650653528d5d SHA-1: 871bf119c3ac8c3a2e2f1dfb3791f8a475c013a7 SHA-256: c126a72a6ab67545a06cebe60dc1076dc65f6b07024878c165d7debcdb531f4d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains heuristics indicating it links to a 'free generator / game hack' redirector, specifically http://netcdn.tw/app/431946152/free-robux-app-game-hack. This lure is designed to trick users into visiting a potentially malicious site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive link.

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/431946152/free-robux-app-game-hack PDF link annotation
    • https://elibrary.ikhac.ac.id/repository/mobile-hacks-for-free-roblox_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/roblox-plates-of-fate-hack_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/roblox-jailbreak-speed-hack-2021_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/coin-master-free-coins-generator_GM406889139.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/roblox-auto-piano-hack_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/roblox-how-to-get-free-robux-website_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/character-hacks-for-robloxian-highschool-roblox_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/coin-master-link_GM406889139.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/minecraft-java-edition-key-free_GM479516143.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-robloxs-birthday-cards_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-50-robux-gift-card-generator_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/hack-robux-free-generator_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/addrbx-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/roblox-free-robux-202100_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/complete-offers-for-robux_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-roblox-rthro_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/coin-master-hack-tool-v1-9-apk_GM406889139.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_off00002e82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E82 22660 bytes
SHA-256: c5e100483e7ba19d0da4edfa634782c28c0bf15a1d4b1fa835aa8dad67701734
font_01_sfnt_off0000612e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x612E 18892 bytes
SHA-256: 98799f5422297995f0985cb1c378b21e0f8722881e70436717831cdef5a17d10

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