Malicious PDF — malware analysis report

Static analysis result for SHA-256 38140e2460428e1c…

MALICIOUS

PDF

47.8 KB Created: 2021-06-03 13:02:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 07481b477bc83c8ef20b174a1cdd8025 SHA-1: 561da2b9c18a6a848d443e3b6cd583aacecd7b3d SHA-256: 38140e2460428e1cd3e904dfba5d281b65f0e5647b88476a0032c650bbd668cb
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-severity heuristic firing indicating it links to a 'free generator / game hack' redirector. The document body, though heavily obfuscated, contains text related to game hacks and includes the primary malicious URL. This suggests the document's purpose is to lure users to a potentially malicious site by promising in-game advantages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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 https://netcdn.online/app/431946152/adopt-me-roblox-money-hack-2021-game-hack PDF link annotation
    • https://lib.stie-yai.ac.id/repository/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/master-coin-free-spin-daily_GM406889139.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-robux-website_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-robux-codes-no-human-verification_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/app-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-roblox-website_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/microsoft-bing-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/coin-master-hacker-club_GM406889139.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/pubg-uc-30_GM1330123889.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/coin-master-hacks-free-spins_GM406889139.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/5-easy-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/pubg-700-uc_GM1330123889.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005157.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5157 25448 bytes
SHA-256: c558fb7cf5e667d901d3983912f5e959fc0ee3583584d320d44ff51b9b76b09e
font_01_sfnt_off00008a49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A49 2880 bytes
SHA-256: 680cee9962ed9b8340f32eb4497b4a869b674082cb72c24c089fa73c4597fa7a
font_02_sfnt_off0000941f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x941F 19416 bytes
SHA-256: a6bfc5212261903eb1d712d06fa870dad44df52547883edbf43ba1f001978b93

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