Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4c3924073f6602e…

MALICIOUS

PDF

34.7 KB Created: 2021-07-05 06:49:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: e6d308a3fe33ebdb6336c7d09b600392 SHA-1: cb306c8bc12901c27f0f756683f227e01328d235 SHA-256: c4c3924073f6602ebba22f5b51de82d472483b19bab8a11a4bca3b2e1eddb851
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/431946152/rbx-place-free-robux-game-hack PDF link annotation
    • http://perpus.stmik-im.ac.id/repository/minecraft-toolbox-premium-apk_GM479516143.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/roblox-free-generator-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/minecraft-games-free-download_GM479516143.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/roblox-robux-hack-download-ios_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/coin-master-fun-free-spins_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/como-quitar-no-soy-un-robot-en-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/how-to-get-robux-on-roblox-for-free-2021_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/roblox-hack-mod-apk-2021_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/hack-robar-c-uentas-de-roblox-akaka_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/roblox-lua-executor-hack_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/hack-de-robux-2021-pastebin_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/robux-free-eazy_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-robux-hack-me_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/coin-master-free-spins-generator_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/how-do-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/coin-master-spin-hack-apk_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-10-robux_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/red-boy-robux-hack_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/can-i-get-minecraft-for-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_off00002ff1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FF1 22852 bytes
SHA-256: 8d203af76bfad861ef371df1ea52ed1aecc74115457d80ace25d44467d46d2d7
font_01_sfnt_off000062e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62E7 18944 bytes
SHA-256: 9547c61a541b439506bd5b7b0d184b57908b992205896235b1a4d0c80bc97bcb

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