Malicious PDF — malware analysis report

Static analysis result for SHA-256 237b512dfcc64f2f…

MALICIOUS

PDF

33.7 KB Created: 2021-07-06 03:39:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: f129c13a5c415f35b265ea28f258e959 SHA-1: 61e3b18a50aaa143842f744e921b3d2a4853e4aa SHA-256: 237b512dfcc64f2f0c1603ecbbbd978be684bff74d57f24c8559644250f6be78
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure, advertising 'free game hacks' to entice users. It contains numerous links to external websites, including one at http://netcdn.tw/app/431946152/how-to-hack-roblox-for-robux-game-hack, which likely hosts a malicious payload or redirects to a phishing page. The ML classifier strongly flagged this PDF as malicious, supporting the observed redirection and lure techniques.

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/how-to-hack-roblox-for-robux-game-hack PDF link annotation
    • http://gts.edu.gh/library/repository/free-robux-without-human-verification-on-pc_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/how-to-use-cheat-engine-to-hack-robux_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/coin-master-reward-link_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/roblox-counter-blox-free-skins_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-spin-link-coin-master-today_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-robux-glitch-2021_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/http-hack-roblox_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-outfits-roblox_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/minecraft-free-computer-game_GM479516143.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/pubg-uc-ykleme-bedava_GM1330123889.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/how-to-get-free-clothes-on-roblox_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/roblox-free-hair-codes_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/how-to-get-robux-for-free-legally_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/hack-electric-state-darkrp-beta-roblox_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-robux-no-humen-varucashe_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-robux-no-waiting-or-loading_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/roblox-hack-age-checker_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/roblox-ios-free-robux_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_off00002d8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D8D 22132 bytes
SHA-256: 228ecc094cfdee7e3997fa9e8f4b7ccde7a6d5da8792797124f26bfdac54da5c
font_01_sfnt_off00005e7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E7B 19124 bytes
SHA-256: 9f0d208e26822d6a242fed99df9fbfacecc5a4ec77afd90406185fcaa2ab8822

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