Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cb3b94290840cc7…

MALICIOUS

PDF

42.8 KB Created: 2021-05-13 19:38:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 87eed993d215fe71dea62e7b9d5abd5d SHA-1: e40a21865e69a68e5acc1d257e74093efc71f78e SHA-256: 7cb3b94290840cc7ea4d913ab9017d3c0bd42c14f982af5be8b9c4ad588635fe
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector infrastructure, which is designed to lead users to download a modified version of the Coin Master game. The document body and embedded URLs reinforce this lure, suggesting a social engineering tactic to trick users into downloading potentially malicious software. No scripts were extracted, but the presence of a malicious redirector and the nature of the lure strongly indicate a malicious intent.

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/coin-master-3.2-mod-hack-unlimited-game-hack In PDF document text
    • http://akvamaster.com.ua/images/hack-coin-master-app-ios_GM406889139.pdfIn PDF document text
    • http://akvamaster.com.ua/images/coin-master-hack-online-without-human-verification_GM406889139.pdfIn PDF document text
    • http://akvamaster.com.ua/images/roblox-controversy_GM431946152.pdfIn PDF document text
    • http://akvamaster.com.ua/images/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://akvamaster.com.ua/images/hack-coin-master-game-apk-download_GM406889139.pdfIn PDF document text
    • http://akvamaster.com.ua/images/coin-master-blogspot-free-spins_GM406889139.pdfIn PDF document text
    • http://akvamaster.com.ua/images/cm-spin-link_GM406889139.pdfIn PDF document text
    • http://akvamaster.com.ua/images/how-do-you-install-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://akvamaster.com.ua/images/how-to-hack-any-roblox-account_GM431946152.pdfIn PDF document text
    • http://akvamaster.com.ua/images/coin-master-apk-mod_GM406889139.pdfIn PDF document text
    • http://akvamaster.com.ua/images/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://akvamaster.com.ua/images/coin-master-online-hack_GM406889139.pdfIn PDF document text
    • http://akvamaster.com.ua/images/free-coin-master-links_GM406889139.pdfIn PDF document text
    • http://akvamaster.com.ua/images/get-me-robux_GM431946152.pdfIn PDF document text
    • http://akvamaster.com.ua/images/is-minecraft-vr-free_GM479516143.pdfIn PDF document text
    • http://akvamaster.com.ua/images/google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://akvamaster.com.ua/images/free-spins-coin-master-march-2021_GM406889139.pdfIn PDF document text
    • http://akvamaster.com.ua/images/114-hacks_GM479516143.pdfIn PDF document text
    • http://akvamaster.com.ua/images/roblox-e-free_GM431946152.pdfIn PDF document text
    • http://akvamaster.com.ua/images/link-for-free-spins-on-coin-master_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_off0000488b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x488B 26208 bytes
SHA-256: 13136fea67a65bd908c62a9bd95bff00193f5c9a60ce684a669c0a7c271eb682
font_01_sfnt_off0000836e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x836E 18772 bytes
SHA-256: ac1fd3966779f84f19650f5e7bf0a5ad3116628acf0836c9bf978cdb1b0100fe