Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a8eac4ed3c2441e…

MALICIOUS

PDF

34.8 KB Created: 2021-06-25 21:24:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 8724065a70b96a8b851aafa3a7d27a47 SHA-1: 77b98443291c1871607c2361de30b1d2c7d1eba7 SHA-256: 5a8eac4ed3c2441e26a5626d5726160793c584be0dca51e30e16f06d1803ffbd
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to known malicious infrastructure, specifically promoting free Robux and game hacks. The ML classifier also flagged this PDF as malicious with high confidence. The document body and embedded URLs suggest a phishing attempt to lure users to potentially malicious sites.

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/cardcode.pw-free-robux-game-hack In PDF document text
    • http://razredna-nastava.net/files/free-minecraft-windows-10-with-java_GM479516143.pdfIn PDF document text
    • https://razredna-nastava.net/files/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/rblx-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/coin-master-hack-app-for-iphone_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/free-spin-card-exchange-coin-master_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/generator-get-robux-free_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/roblox-hack-site_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/coin-master-free-spins-link-no-verification-code_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/coin-master-free-download-app_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/www-coinmaster_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/legit-coin-master-hack-october-2021_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/game-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/coin-master-link_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/what-tiktok-free-movies_GM835599320.pdfIn PDF document text
    • http://razredna-nastava.net/files/minecraft-free-download_GM479516143.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-spin-coin-master-link-today_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-london-map-roblox_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/pubg-uc-hack-software_GM1330123889.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-robux-by-watching-ads_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_off00003000.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3000 22472 bytes
SHA-256: 0644bc79fa50384430a014472271d98168ffa51ab9ba781e37634866d73fca1a
font_01_sfnt_off0000621e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x621E 19296 bytes
SHA-256: e896d3782fcebc6f6ab0b07c41f208f0bbbf4b676c1ec6cb429bba9494b2610e