Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1ecad10f35adb6c…

MALICIOUS

PDF

41.1 KB Created: 2021-05-12 20:12:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 88bdc160d7deac992c0d80aecad00e37 SHA-1: 64693406f773897bfac4708c6a4c990039540fe3 SHA-256: b1ecad10f35adb6c064a3b326a2e0dcb9eb12dab6e4f7eb29a7e0671b90f140c
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that point to known malicious redirector infrastructure, specifically `https://netcdn.xyz/app/406889139/http-blackgames.us-coin-master-hack-game-hack`. The ML classifier also flagged this PDF with high confidence. The presence of a visual download button lure further supports the malicious intent of directing users to a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/406889139/http-blackgames.us-coin-master-hack-game-hack In PDF document text
    • http://centuriatus.com/images/coin-master-free-spins-instagram_GM406889139.pdfIn PDF document text
    • http://centuriatus.com/images/coin-master-download_GM406889139.pdfIn PDF document text
    • http://centuriatus.com/images/coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://centuriatus.com/images/moonactive-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://centuriatus.com/images/free-robux-mobile_GM431946152.pdfIn PDF document text
    • http://centuriatus.com/images/coin-master-free-spins-facebook_GM406889139.pdfIn PDF document text
    • http://centuriatus.com/images/robux-offers_GM431946152.pdfIn PDF document text
    • http://centuriatus.com/images/roblox-hack-com_GM431946152.pdfIn PDF document text
    • http://centuriatus.com/images/minecraft-free-download-chromebook_GM479516143.pdfIn PDF document text
    • http://centuriatus.com/images/how-to-get-free-skins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://centuriatus.com/images/can-i-have-robux_GM431946152.pdfIn PDF document text
    • http://centuriatus.com/images/coin-master-villages_GM406889139.pdfIn PDF document text
    • http://centuriatus.com/images/free-roblox-hack_GM431946152.pdfIn PDF document text
    • http://centuriatus.com/images/minecraft-hacks-18-9_GM479516143.pdfIn PDF document text
    • http://centuriatus.com/images/free-vpn-for-minecraft_GM479516143.pdfIn PDF document text
    • http://centuriatus.com/images/how-to-make-a-minecraft-java-server-for-free_GM479516143.pdfIn PDF document text
    • http://centuriatus.com/images/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • http://centuriatus.com/images/roblox-source_GM431946152.pdfIn PDF document text
    • http://centuriatus.com/images/coin-master-cheats_GM406889139.pdfIn PDF document text
    • http://centuriatus.com/images/give-me-robux-now_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_003_off000046d4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x46D4 23292 bytes
SHA-256: 11d8881e146a883b027495659cc3c21922839399ec114d0ef578fa895e8111a9
font_01_sfnt_off00007bbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BBB 19136 bytes
SHA-256: e1ce9e50dc4c3ad4d5b024a56bf1f44a8cbdcd2d74a5ef61a387106358d48fcb

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