Malicious PDF — malware analysis report

Static analysis result for SHA-256 897b3b1399de973d…

MALICIOUS

PDF

33.8 KB Created: 2021-07-04 09:10:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 25bcb2c11e35f12632e7554027c8a5d6 SHA-1: 5d00a60a7ce28915bd9351d4a1b929f6c05a9864 SHA-256: 897b3b1399de973df26f342a7ee2fe6b9b0b47ffbb17240c11919cf8d07a8f03
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high-confidence heuristic firing for a game hack redirect lure, pointing to a suspicious URL. The document body and embedded URLs reinforce this theme, suggesting a scam or phishing attempt. While no scripts were explicitly extracted, the PDF structure and embedded URIs indicate a malicious intent to redirect the user to potentially harmful content.

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/406889139/mcmaster-club-coin-master-hack-game-hack PDF link annotation
    • https://pt-mataram.go.id/perpustakaan/repository/22-500-robux-free-2021_GM431946152.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/robux-free-roblox-2021_GM431946152.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/comment-hacker-une-page-roblox_GM431946152.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/cuenta-hackeada-roblox_GM431946152.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/robux-hack-v1-0-pastebin_GM431946152.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/minecraft-pvp-hacks_GM479516143.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/free-online-generator-for-coin-master_GM406889139.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/how-to-get-free-robux-2021-no-verification-no-scam_GM431946152.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/free-robux-no-human-verification-or-survey-2021-real_GM431946152.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/coin-master-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/play-coin-master-for-free_GM406889139.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/free-skin-in-roblox_GM431946152.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/radio-cheat-roblox_GM431946152.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/how-to-hack-atms-in-roblox-libertay-county_GM431946152.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/how-to-get-minecraft-pe-for-free_GM479516143.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/free-roblox-accounts-with-builders-club_GM431946152.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/hacks-para-roblox-windows-10_GM431946152.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/how-to-get-free-knives-in-assassin-roblox-2021_GM431946152.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/free-avatar-roblox_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_off00002fff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FFF 21908 bytes
SHA-256: 89794f6386933dd21634e7981d1ed7af14a7b9cc499875166560b36497b56e3b
font_01_sfnt_off0000603e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x603E 18636 bytes
SHA-256: 3ff0f4f75a0a90b9327d70ca0f6ece0c1b2cc0f38d50ceb21f3733858aa42cbb

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