Malicious PDF — malware analysis report

Static analysis result for SHA-256 e78a3a9a9df9c18f…

MALICIOUS

PDF

43.3 KB Created: 2021-05-13 08:04:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: aeb1797a126cf8d5fca00ccf41d9ad29 SHA-1: b859d19f605eafa261b712bbb1fe5daf8009410a SHA-256: e78a3a9a9df9c18fdb7d8ba1d6241b37046ff430734640a4d2caf0fa10b04735
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link that redirects to known malicious infrastructure, specifically designed to distribute an application. The ML classifier also flagged this PDF as malicious. The presence of multiple links and the overall structure suggest a phishing or scam attempt to trick users into downloading potentially harmful software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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/coin-master-apk-hack-3.5.27-game-hack In PDF document text
    • https://www.ghknights.org/images/free-spin-and-coin-blogspot-com_GM406889139.pdfIn PDF document text
    • http://ghknights.org/images/how-to-download-wurst_GM479516143.pdfIn PDF document text
    • https://www.ghknights.org/images/minecraft-free-play-no-download_GM479516143.pdfIn PDF document text
    • http://ghknights.org/images/coin-master-free-spins-2021-generator_GM406889139.pdfIn PDF document text
    • http://ghknights.org/images/hack-coin-master-apk-33_GM406889139.pdfIn PDF document text
    • http://ghknights.org/images/i-cant-get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://ghknights.org/images/coin-master-hack-tool-without-verification_GM406889139.pdfIn PDF document text
    • https://www.ghknights.org/images/daily-free-spin-coin-master-link_GM406889139.pdfIn PDF document text
    • http://ghknights.org/images/minecraft-noob-vs-pro-vs-hacker_GM479516143.pdfIn PDF document text
    • http://ghknights.org/images/how-to-get-free-robux-easy-no-download_GM431946152.pdfIn PDF document text
    • https://www.ghknights.org/images/coin-master-free-spins-link-may-2021_GM406889139.pdfIn PDF document text
    • http://ghknights.org/images/roblox-bloxburg-hack_GM431946152.pdfIn PDF document text
    • http://ghknights.org/images/coin-master-free-spins-april-2021_GM406889139.pdfIn PDF document text
    • http://ghknights.org/images/minecraft-hacks-list_GM479516143.pdfIn PDF document text
    • http://ghknights.org/images/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • https://www.ghknights.org/images/http-bit-ly-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.ghknights.org/images/aristois-minecraft-hack_GM479516143.pdfIn PDF document text
    • https://www.ghknights.org/images/free-coin-master-gift-link_GM406889139.pdfIn PDF document text
    • http://ghknights.org/images/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • https://www.ghknights.org/images/free-robux-app_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000468f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x468F 23612 bytes
SHA-256: 609cfd436d01930dca009049b601faea5f58a18c5fc2e2709c600634afc4a336
font_01_sfnt_off00007c29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C29 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off000085db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85DB 18448 bytes
SHA-256: d7b411bc329c7870ca7e99b8bc052e1a3384b1dfbd17097feb878e8a7e113822

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