Malicious PDF — malware analysis report

Static analysis result for SHA-256 231bdfd7f65149c2…

MALICIOUS

PDF

34.9 KB Created: 2021-07-06 10:09:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 5545c053a6680dc3ffdcb73aba506c57 SHA-1: d0ecf7c846b15a30a196c8ae29417841ad943e5c SHA-256: 231bdfd7f65149c2e2d112f2304910995a135f33f9f6660153e3883c636cf40c
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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/como-hack-coin-master-game-hack PDF link annotation
    • http://rsudtenriawarubone.com/perpustakaan//repository/spin-rewards-coin-master_GM406889139.pdfIn PDF document text
    • http://rsudtenriawarubone.com/perpustakaan//repository/coin-master-coins_GM406889139.pdfIn PDF document text
    • http://rsudtenriawarubone.com/perpustakaan//repository/how-many-levels-does-coin-master-have_GM406889139.pdfIn PDF document text
    • http://rsudtenriawarubone.com/perpustakaan/repository/how-to-download-minecraft-for-free-on-windows_GM479516143.pdfIn PDF document text
    • http://rsudtenriawarubone.com/perpustakaan//repository/how-to-win-attack-madness-in-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://rsudtenriawarubone.com/perpustakaan//repository/best-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://rsudtenriawarubone.com/perpustakaan/repository/minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • http://rsudtenriawarubone.com/perpustakaan//repository/roblox-sign-in-free_GM431946152.pdfIn PDF document text
    • http://rsudtenriawarubone.com/perpustakaan/repository/how-do-you-hack-roblox_GM431946152.pdfIn PDF document text
    • http://rsudtenriawarubone.com/perpustakaan/repository/roblox-admin-hack_GM431946152.pdfIn PDF document text
    • http://rsudtenriawarubone.com/perpustakaan//repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://rsudtenriawarubone.com/perpustakaan/repository/free-robux-card-codes_GM431946152.pdfIn PDF document text
    • http://rsudtenriawarubone.com/perpustakaan/repository/facebook-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://rsudtenriawarubone.com/perpustakaan//repository/roblox-place-rewards_GM431946152.pdfIn PDF document text
    • http://rsudtenriawarubone.com/perpustakaan//repository/free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://rsudtenriawarubone.com/perpustakaan/repository/mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
    • http://rsudtenriawarubone.com/perpustakaan/repository/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • http://rsudtenriawarubone.com/perpustakaan/repository/get-free-robux-info_GM431946152.pdfIn PDF document text
    • http://rsudtenriawarubone.com/perpustakaan/repository/minecraft-windows-10-code-free_GM479516143.pdfIn PDF document text
    • http://rsudtenriawarubone.com/perpustakaan//repository/coin-master-cheats-without-verification_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_off00003359.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3359 22696 bytes
SHA-256: b9c532ba6d96c7ed0ffa97554ad20dd8ef90763aaa2de6d9d8c2ff75e1c433da
font_01_sfnt_off000065d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65D6 18264 bytes
SHA-256: 5cb47b0ef94a76483d9f456b7bf8084a738c4f06f73b863c89be712ca91b2a0d

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