Malicious PDF — malware analysis report

Static analysis result for SHA-256 46f2f2d327ef548e…

MALICIOUS

PDF

43.1 KB Created: 2021-06-07 16:36:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 50c26974c93d796ee070908fb0594b35 SHA-1: 8953bfa8e5aed66bc1bc104f0297011f95b1f745 SHA-256: 46f2f2d327ef548eecd5ef802302b3c2e3684d576bcbb3dbaeca2cb6ee8db22f
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to known malicious infrastructure, specifically targeting users with "free Robux" lures. The presence of a visual download button further supports the malicious intent of tricking users into downloading a payload. No scripts were extracted, but the PDF structure and embedded URLs strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.tw/app/431946152/get-me-free-robux.com-game-hack In PDF document text
    • http://acp-institut.fr/images/coin-master-hack-uk_GM406889139.pdfIn PDF document text
    • http://acp-institut.fr/images/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://acp-institut.fr/images/coinmaster-spin-ml_GM406889139.pdfIn PDF document text
    • http://acp-institut.fr/images/roblox-arsenal-hack_GM431946152.pdfIn PDF document text
    • http://acp-institut.fr/images/free-vip-server-roblox_GM431946152.pdfIn PDF document text
    • http://acp-institut.fr/images/free-minecraft-alt-accounts_GM479516143.pdfIn PDF document text
    • http://acp-institut.fr/images/coin-master-free-link-facebook_GM406889139.pdfIn PDF document text
    • http://acp-institut.fr/images/how-to-get-a-lot-of-robux_GM431946152.pdfIn PDF document text
    • http://acp-institut.fr/images/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://acp-institut.fr/images/how-to-get-free-robux-without-email_GM431946152.pdfIn PDF document text
    • http://acp-institut.fr/images/rewards-robux_GM431946152.pdfIn PDF document text
    • http://acp-institut.fr/images/free-minecraft-education-edition_GM479516143.pdfIn PDF document text
    • http://acp-institut.fr/images/coin-master-attack-hack-apk_GM406889139.pdfIn PDF document text
    • http://acp-institut.fr/images/free-robux-site_GM431946152.pdfIn PDF document text
    • http://acp-institut.fr/images/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • http://acp-institut.fr/images/real-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://acp-institut.fr/images/free-coins-for-flip-master_GM406889139.pdfIn PDF document text
    • http://acp-institut.fr/images/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://acp-institut.fr/images/roblox-free-wings_GM431946152.pdfIn PDF document text
    • http://acp-institut.fr/images/apps-for-free-robux_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_off00004dbe.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4DBE 24132 bytes
SHA-256: e643af9fe94e4610fa3f689a8fafdd9d0f46f8a39db52df132506e52ae2dfb81
font_01_sfnt_off000084f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84F6 18640 bytes
SHA-256: 9c03a2d8ede54ba6fe879de6fa8eb20b6b07890642bdfae6c2b441fd3b30d630

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