Malicious PDF — malware analysis report

Static analysis result for SHA-256 71ecb7ea91fa71d7…

MALICIOUS

PDF

33.1 KB Created: 2021-06-26 08:23:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 2c1d9ab8d556e89eda8bbd416999914e SHA-1: 70e48fe5fd7e578d92e958357187d880c9544a43 SHA-256: 71ecb7ea91fa71d71fb78a9f2e72c6676e29d3d4772e8869352d92680a46d131
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'http://netcdn.co/app/431946152/www.free-face-on-roblox.com-game-hack'. The document body also contains this URL and numerous other URLs related to game hacks and free virtual currency, suggesting a lure for users interested in such topics. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/www.free-face-on-roblox.com-game-hack In PDF document text
    • https://belajar.mtsn4malang.sch.id/__statics/gudangsoal/files/coin-master-free-spins-daily-1-ga_GM406889139.pdfIn PDF document text
    • https://belajar.mtsn4malang.sch.id/__statics/gudangsoal/files/coin-master-games-hack_GM406889139.pdfIn PDF document text
    • https://belajar.mtsn4malang.sch.id/__statics/gudangsoal/files/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://belajar.mtsn4malang.sch.id/__statics/gudangsoal/files/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://belajar.mtsn4malang.sch.id/__statics/gudangsoal/files/login-robux_GM431946152.pdfIn PDF document text
    • https://belajar.mtsn4malang.sch.id/__statics/gudangsoal/files/hack-game-coin-master_GM406889139.pdfIn PDF document text
    • https://belajar.mtsn4malang.sch.id/__statics/gudangsoal/files/robux-generator-that-works_GM431946152.pdfIn PDF document text
    • https://belajar.mtsn4malang.sch.id/__statics/gudangsoal/files/free-group-roblox_GM431946152.pdfIn PDF document text
    • https://belajar.mtsn4malang.sch.id/__statics/gudangsoal/files/best-way-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://belajar.mtsn4malang.sch.id/__statics/gudangsoal/files/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://belajar.mtsn4malang.sch.id/__statics/gudangsoal/files/roblox-free-robux-console_GM431946152.pdfIn PDF document text
    • https://belajar.mtsn4malang.sch.id/__statics/gudangsoal/files/roblox-hair-for-free_GM431946152.pdfIn PDF document text
    • https://belajar.mtsn4malang.sch.id/__statics/gudangsoal/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://belajar.mtsn4malang.sch.id/__statics/gudangsoal/files/games-for-robux_GM431946152.pdfIn PDF document text
    • https://belajar.mtsn4malang.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://belajar.mtsn4malang.sch.id/__statics/gudangsoal/files/free-robux-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • https://belajar.mtsn4malang.sch.id/__statics/gudangsoal/files/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • https://belajar.mtsn4malang.sch.id/__statics/gudangsoal/files/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://belajar.mtsn4malang.sch.id/__statics/gudangsoal/files/free-robux-group_GM431946152.pdfIn PDF document text
    • https://belajar.mtsn4malang.sch.id/__statics/gudangsoal/files/when-pubg-uc-available_GM1330123889.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_off00002a7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A7C 22192 bytes
SHA-256: ed1bb1c01f8a9087ac28a38d31b5f30caa1a7057b215fd999459c54167ba9e41
font_01_sfnt_off00005bb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BB3 19340 bytes
SHA-256: 9eb6a71d7cc2764abc68c2ba6c0bf50938762681c87837bc22e690bb17faad61

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