Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fcb649054301408…

MALICIOUS

PDF

36.5 KB Created: 2021-06-23 05:43:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e22164e92d20cc0f5eceffad50e37d6a SHA-1: bfd80a27ba0f34d040661192477a83b9a243be17 SHA-256: 9fcb649054301408648a4b41478c1406713edcbc2555f153d32ec37a9cb0bd95
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links and document body text that explicitly mention 'free robux' and 'coin master hack', indicating a lure for users interested in game cheats. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms that the primary link leads to known malicious infrastructure, likely for delivering a second-stage payload. No scripts were extracted, but the presence of malicious links and the ML classifier's high confidence suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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.co/app/431946152/https-web.robloxknife-simulator.com-games-202120218-how-to-get-free-robux-game-hack In PDF document text
    • http://library.atim.ac.id/repository/coin-master-free-spins-and-coins-today_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-robux-genderator-roblxo-2021-no-downlaod-working_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/roblox-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/coins-master-hack_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/ultimate-driving-roblox-money-hack-2021_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-robux-promo-codes-2021-april_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-robux-that-actually-works_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/robux-free-com_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/how-to-hack-coin-master-using-es-file_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/the-labyrinth-hack-roblox_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/coin-master-heaven-free-spins-today_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/hack-minecraft_GM479516143.pdfIn PDF document text
    • http://library.atim.ac.id/repository/minecraft-texture-packs-free-download_GM479516143.pdfIn PDF document text
    • http://library.atim.ac.id/repository/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-rich-accounts-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/hack-robux-using-cjrom-web-store_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/how-to-hack-coin-master-game-without-root_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/how-to-get-free-robux-on-pc-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000031f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31F6 22856 bytes
SHA-256: 8f391b03b13eb63fb312f854816dd8b5d0f8f432ae2f515b5a5367d8f0c6047c
font_01_sfnt_off00006550.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6550 20528 bytes
SHA-256: 3ccc29252a2e3a12180dce64b7abc7086e6913c99ee8e93bc97a11e201d1f6e4

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