Malicious PDF — malware analysis report

Static analysis result for SHA-256 a528c4084e3de4bf…

MALICIOUS

PDF

43.2 KB Created: 2021-05-17 13:17:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 4b1140674fe21eb15c3dfabda1813936 SHA-1: ac1ad8edfffab8005e7ac042bafb26d0fdc89370 SHA-256: a528c4084e3de4bf95540690f5fd877b4c74c004a54d5dc29ac9c3ba2815de53
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF document contains embedded links and text that promote free downloads for popular games like Coin Master and Robux. One of the embedded URLs, https://netcdn.xyz/app/406889139/coin-master-3.3.2-apk-free-download-game-hack, is flagged as a malicious redirector. The presence of multiple links to similar download sites and the ML classifier's high confidence score indicate a malicious intent to trick users into downloading potentially unwanted or harmful applications.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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-3.3.2-apk-free-download-game-hack In PDF document text
    • http://g3galileo.com/images/minecraft-pe-apk-free-download_GM479516143.pdfIn PDF document text
    • http://g3galileo.com/images/free-robux-apps-that-work_GM431946152.pdfIn PDF document text
    • http://g3galileo.com/images/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • http://g3galileo.com/images/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://g3galileo.com/images/free-roblox-codes_GM431946152.pdfIn PDF document text
    • http://g3galileo.com/images/bux-life-free-robux_GM431946152.pdfIn PDF document text
    • http://g3galileo.com/images/free-robux-no-verification-2021-ios_GM431946152.pdfIn PDF document text
    • http://g3galileo.com/images/give-free-robux_GM431946152.pdfIn PDF document text
    • http://g3galileo.com/images/download-coin-master-hack-mod-apk_GM406889139.pdfIn PDF document text
    • http://g3galileo.com/images/coin-master-hack-apk-app_GM406889139.pdfIn PDF document text
    • http://g3galileo.com/images/spin-coin-master-free_GM406889139.pdfIn PDF document text
    • http://g3galileo.com/images/coin-master-hack-tool-apk-download_GM406889139.pdfIn PDF document text
    • http://g3galileo.com/images/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://g3galileo.com/images/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://g3galileo.com/images/coin-master-free-spins-hack-link_GM406889139.pdfIn PDF document text
    • http://g3galileo.com/images/google-roblox-games_GM431946152.pdfIn PDF document text
    • http://g3galileo.com/images/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://g3galileo.com/images/kuso-icu-roblox-hack_GM431946152.pdfIn PDF document text
    • http://g3galileo.com/images/free-spins-coin-master-2021-glitch_GM406889139.pdfIn PDF document text
    • http://g3galileo.com/images/coin-master-free-spin-ml_GM406889139.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_off00004a75.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A75 24964 bytes
SHA-256: 0a2788df434d2c5165725c64cb00015897f1b928b0f03da924bfa00922b557ff
font_01_sfnt_off0000844a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x844A 19000 bytes
SHA-256: 784b1e1b1d240dab4fb966bf2beaa9dcc272aea1979d30251c3bbe87cc6a5b4c