Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e6f0f70cc870238…

MALICIOUS

PDF

44.0 KB Created: 2021-06-03 05:55:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 21f61b434b2c0942e523b6f68f363a5f SHA-1: 715f8bb7b15797df5a909eea22edad63348f744d SHA-256: 4e6f0f70cc870238e3c8fa929d69fbd7eb79ce884e33d5f124cbc312b7528984
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a fake CAPTCHA lure, designed to trick users into interacting with a malicious link. The embedded URL, https://netcdn.online/app/406889139/coin-master-100-spin-slot-game-hack, likely leads to the download of a second-stage payload. The document's content and heuristics strongly suggest a phishing or social engineering attack aimed at tricking users into downloading malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 4

  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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-100-spin-slot-game-hack PDF link annotation
    • http://perpustakaan.fk.unila.ac.id/repository/coin-master-hack-100-working_GM406889139.pdfIn PDF document text
    • http://perpustakaan.fk.unila.ac.id/repository/coin-master-spin-link-today_GM406889139.pdfIn PDF document text
    • http://perpustakaan.fk.unila.ac.id/repository/coin-master-hack-apk-free-download_GM406889139.pdfIn PDF document text
    • http://perpustakaan.fk.unila.ac.id/repository/how-to-get-free-minecraft-coins_GM479516143.pdfIn PDF document text
    • http://perpustakaan.fk.unila.ac.id/repository/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.fk.unila.ac.id/repository/free-roblox-shirt-templates_GM431946152.pdfIn PDF document text
    • http://perpustakaan.fk.unila.ac.id/repository/minecraft-pe-free-download_GM479516143.pdfIn PDF document text
    • http://perpustakaan.fk.unila.ac.id/repository/robux-premium_GM431946152.pdfIn PDF document text
    • http://perpustakaan.fk.unila.ac.id/repository/info-roblox-com-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.fk.unila.ac.id/repository/boku-no-roblox-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.fk.unila.ac.id/repository/coin-master-free-cards-hack_GM406889139.pdfIn PDF document text
    • http://perpustakaan.fk.unila.ac.id/repository/free-robux-com_GM431946152.pdfIn PDF document text
    • http://perpustakaan.fk.unila.ac.id/repository/minecraft-hacked-client-112-2_GM479516143.pdfIn PDF document text
    • http://perpustakaan.fk.unila.ac.id/repository/coin-master-free-spins-link-2021-hack_GM406889139.pdfIn PDF document text
    • http://perpustakaan.fk.unila.ac.id/repository/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://perpustakaan.fk.unila.ac.id/repository/give-me-robux-now_GM431946152.pdfIn PDF document text
    • http://perpustakaan.fk.unila.ac.id/repository/earn-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://perpustakaan.fk.unila.ac.id/repository/how-to-make-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.fk.unila.ac.id/repository/free-robux-codes-no-human-verification_GM431946152.pdfIn PDF document text
    • http://perpustakaan.fk.unila.ac.id/repository/free-robux-that-actually-works-2021_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_off00005253.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5253 24252 bytes
SHA-256: 98a8937fb49a03ec48ba2dc258198be4237f549663a12423876852d698e3ff58
font_01_sfnt_off000089be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89BE 18072 bytes
SHA-256: e186f2c49e0e53813a98f8c0f9ecdb2b905b101c49c302baec32f8d5c8ad9fd8

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