Malicious PDF — malware analysis report

Static analysis result for SHA-256 f955685ef00d0a27…

MALICIOUS

PDF

35.3 KB Created: 2021-07-06 10:14:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: ef127a235a8366af25da4a9231fafd3e SHA-1: 9789bf4f0296210b651323d3e3be570e57af4163 SHA-256: f955685ef00d0a27343a413f51343bf9d3649a9dab012f7e3e8bd75651a0b8fa
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high-severity heuristic indicating it links to a 'free generator / game hack' redirector, specifically http://netcdn.tw/app/431946152/apps-that-give-you-free-robux-game-hack. The document body also contains this URL and mentions 'Apps That Give You Free Robux', suggesting a lure for potentially malicious content or scams. While no scripts were explicitly extracted, the PDF structure and embedded URI point towards a social engineering attack.

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/apps-that-give-you-free-robux-game-hack PDF link annotation
    • http://library.umuslim.ac.id/repository/roblox-private-plane-free_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/jefftec-free-robux_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/roblox-hack-com_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/how-to-hack-robux-on-windows_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/how-to-make-a-modded-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-robux-xbox-one-2021_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/hack-peoples-phones-for-money-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/rc7-for-mac-roblox-free_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/how-to-hack-a-draw-it-server-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-boat-ride-roblox-funneh_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/roblox-freak-bloxers-hacks_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/coin-master-free-spins-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-robux-website-survey_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/roblox-cheat-script-auto-farm-super-power-training-simulator_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/roblox-jailberak-hack_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/will-minecraft-dungeons-be-free_GM479516143.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/coin-master-free-spins-and-coins-app_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/twitter-coin-master-free-spins_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_off00003177.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3177 22484 bytes
SHA-256: 66ecb0da22578177adaec625175323e17d4310fcea18c3e3255bc632264274d3
font_01_sfnt_off000063a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63A7 19560 bytes
SHA-256: 44687920bbab424739eb00f0c10a6a4a3701389ccd8aaf990bb054a3fc46e25a

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