Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4875098f2ce5f65…

MALICIOUS

PDF

35.2 KB Created: 2021-07-05 16:07:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 05e22e5f7e4fa86bbcc62f3b9cd33d41 SHA-1: d171c24086b37479107ca40c7572ae77140905dc SHA-256: f4875098f2ce5f654d94be02dd901aa783b7413aadcc92dec5e31f1127f11fd7
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of game hacks and free in-game currency to entice users. It contains a large number of external links, many pointing to other PDF files hosted on similar domains, suggesting a link farm or SEO manipulation tactic. The primary URL http://netcdn.tw/app/406889139/coin-master-daily-free-spins-game-hack is a clear indicator of a scam or potentially malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/406889139/coin-master-daily-free-spins-game-hack PDF link annotation
    • http://fia.ub.ac.id/katalog/repository/roblox-rewards-robux_GM431946152.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/how-to-get-minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/how-to-hack-a-roblox-game-easy_GM431946152.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/how-to-cheat-in-roblox_GM431946152.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/coin-master-free-spins-link-today-instagram_GM406889139.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/coin-master-free-cards-hack_GM406889139.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/coin-master-free-spin-2912-2021_GM406889139.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/daily-free-spin-coin-master-link_GM406889139.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/free-roblox-injector_GM431946152.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/coin-master-hack-game-download-mod-apk_GM406889139.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/rbl-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/coin-master-free-spins-generator-no-verification_GM406889139.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/free-robux-100-real_GM431946152.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/free-robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/coin-master-hack-tool-download_GM406889139.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/roblox-hacked-version-download_GM431946152.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/coin-master-hack-dot-xyz_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_off0000329e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x329E 22968 bytes
SHA-256: 9b4fabf888a6a9a96e979da14584ecef7f725342d1142db05b982aca76c38478
font_01_sfnt_off00006620.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6620 18596 bytes
SHA-256: d4477381221bf12ecca5ad3e1f3dc1fc74afabeab8ec0ad27ac375f28b3d2402

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