Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3b91704e5e7dfcf…

MALICIOUS

PDF

43.8 KB Created: 2021-06-03 11:15:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 6a15fb350db86590f7337042e353518a SHA-1: 3c4d7c16bd1c95566440fcc0cd0ed0865ee64753 SHA-256: f3b91704e5e7dfcf85580b295c5f012b449f2e7c4673c9c09722d1d0bb3b2a26
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high-severity heuristic indicating it links to a game hack redirector, specifically pointing to a URL designed to lure users. The ML classifier also flagged this PDF as malicious with high confidence. The document body, though heavily obfuscated, contains references to the same malicious URL, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.online/app/406889139/coin-master-free-online-game-game-hack PDF link annotation
    • https://perpustakaan.itda.ac.id/repository/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/coin-master-gift-hack_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/legit-coin-master-hack-october-2021_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-coin-coin-master_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/coin-master-free-spins-coins_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/hack-coin-pro-coin-master_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-robux-no-generator_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/robux-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-tiktok-likes-2021_GM835599320.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/roblox-adopt-me-hack_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-robux-download_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/hacks-for-roblox-prison-life_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/coin-master-free-spins-without-human-verification_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/50-000-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/how-to-hack-minecraft_GM479516143.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-games-like-minecraft_GM479516143.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/coin-master-cheat-apk-free-download_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-coins-coin-master-link_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/make-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
stream_004_off00005140.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5140 24660 bytes
SHA-256: b1cb4d7a30690fd41c51547f39d1ec8f1203c2ab79dd9fd8b45e8b70d720d080
font_01_sfnt_off0000897a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x897A 18044 bytes
SHA-256: f55611517853c9a75744f85dcee2126c23b046b59fba7ee14d63f8cfd243840d

Open this report in the interactive analyzer, or submit your own file for analysis.