Malicious PDF — malware analysis report

Static analysis result for SHA-256 13724da13551ca9f…

MALICIOUS

PDF

35.0 KB Created: 2021-06-20 07:19:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 731e93f040f21ea9f65614dab0bad180 SHA-1: 6d0ea2d47f714d6298363d0a7e56b38ae6bcc79c SHA-256: 13724da13551ca9fc3c9853ff76e0178bef2aa64e58a158ba8f13d93dcb7cb97
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs and a visual download button, all pointing to sites offering game hacks and cheats. The primary URL, http://netcdn.co/app/431946152/roblox-hack-999.999-robux-tablet-game-hack, is flagged as a known malicious redirector. The document body explicitly mentions 'Roblox Hack' and 'Robux', reinforcing the lure. While no scripts were extracted, the presence of malicious redirector links and the deceptive content strongly suggest an attempt to trick users into downloading malware.

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/roblox-hack-999.999-robux-tablet-game-hack In PDF document text
    • http://www.elibrary.perludem.org/repository/minecraft-free-download-ipad_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-key-free-spin_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-cheat-engine-table-and-bypass-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/qidqeo-hacker-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/http-blackgamesus-coinmasterhack_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/are-pubg-uc-cheap_GM1330123889.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-pet-food-coin-master_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/get-roebucks-com_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/zombie-rush-roblox-hack-v3rmillion_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/roblox-hack-download-pc_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/minecraft-java-edition-free-code_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-real-hack_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-fan-page-facebook_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/watch-ads-for-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/ways-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/roblox-island-2-hack_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/hack-de-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/robloxheroxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/hacks-for-sailing-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-get-free-robux-easy-robux-today_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_off00002f9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F9E 22956 bytes
SHA-256: 1b7184a9454097d9d0c16692fe36f14d315e40cffb7629c311e8f4e2ded57e5a
font_01_sfnt_off0000633d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x633D 19132 bytes
SHA-256: b5db3d4e8204ac6b9a598dbd4946ca39a03cb872ce2841f8e369fa6a8f5dc3e2

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