Malicious PDF — malware analysis report

Static analysis result for SHA-256 542bffeef786c507…

MALICIOUS

PDF

34.2 KB Created: 2021-07-04 18:30:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: f4f38952ba6580d00952ae59c95bd9f4 SHA-1: cf05ba91af5bd87eeb749d39a8b32a0fd7b571e7 SHA-256: 542bffeef786c507b60ad999d059dbf29d2a0eac3723ae04717f71037729075e
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to free game hacks and currency to entice users. It contains multiple embedded URLs, with the primary one being http://netcdn.tw/app/431946152/e-free-roblox-game-hack, which likely leads to a malicious download or exploit. The ML classifier strongly flagged this PDF as malicious, supporting the observed lure and URL findings.

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/e-free-roblox-game-hack PDF link annotation
    • http://library.asih-husada.ac.id/repository/youtube-inquisitormaster-free-robux_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/coin-master-hack-xyz-apk-download_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/comment-gagner-des-robux-sans-hack_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/hack-admin-roblox-weaponds-giver_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/free-robux-24-02-2021_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/how-do-you-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/arsenal-roblox-hacks-pasebin_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/spin-and-coin-link_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/roblox-play-online-for-free-no-download_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/free-robux-not-fake_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/how-to-get-free-spins-on-coin-master-android_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/free-comedy-music-spy-and-die-roblox-id_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/free-spin-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/how-do-you-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/minecraft-free-download-windows-10_GM479516143.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/how-to-install-hacks-to-roblox_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/roblox-robux-hack-for-mac_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/how-to-hack-into-games-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/free-accounts-roblox-download-for-chromebook_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_off00002f1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F1E 22600 bytes
SHA-256: e8ae0e0d7892ad0a1d0ca0607a4cc0b3b4e574acbb38534a2d126b60f4fbaa89
font_01_sfnt_off000061b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61B5 18652 bytes
SHA-256: 491e525d3204e4009c2358898e88a516766cfb2a3bec72a07ee9be2d9588b88d

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