Malicious PDF — malware analysis report

Static analysis result for SHA-256 eefe3a44d21557b6…

MALICIOUS

PDF

42.8 KB Created: 2021-05-16 04:25:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 7eb09703f6ff99ba4a7706ff17ea3eef SHA-1: 5270a51501dfdcf90bc0fe72394c29de5b10ce09 SHA-256: eefe3a44d21557b6c9ee34c41d122ba4df96bf37e93e74272a45df6ebbb4dcab
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to malicious redirectors, masquerading as game hack generators and free currency sites. The primary malicious URL identified is https://netcdn.xyz/app/406889139/coin-master-daily-free-spins-link-march-2021-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly indicate a phishing or malware distribution attempt, likely leveraging a client-side exploit or redirect chain to deliver a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • 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-daily-free-spins-link-march-2021-game-hack In PDF document text
    • http://www.vktzunami.cz/images/is-minecraft-free_GM479516143.pdfIn PDF document text
    • http://www.vktzunami.cz/images/how-to-get-free-hats-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.vktzunami.cz/images/coin-master-hack-2021-no-human-verification_GM406889139.pdfIn PDF document text
    • http://www.vktzunami.cz/images/hack-coin-master-free_GM406889139.pdfIn PDF document text
    • http://www.vktzunami.cz/images/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://www.vktzunami.cz/images/minecraft-hack-client-18-9_GM479516143.pdfIn PDF document text
    • http://www.vktzunami.cz/images/how-to-get-1-million-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.vktzunami.cz/images/free-gfx-roblox_GM431946152.pdfIn PDF document text
    • http://www.vktzunami.cz/images/www-rbx-com_GM431946152.pdfIn PDF document text
    • http://www.vktzunami.cz/images/coin-master-hack-free-spins_GM406889139.pdfIn PDF document text
    • http://www.vktzunami.cz/images/roblox-piano-hack_GM431946152.pdfIn PDF document text
    • http://www.vktzunami.cz/images/update-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.vktzunami.cz/images/freespinandcoin-blogspot_GM406889139.pdfIn PDF document text
    • http://www.vktzunami.cz/images/free-robux-games_GM431946152.pdfIn PDF document text
    • http://www.vktzunami.cz/images/win-free-robux_GM431946152.pdfIn PDF document text
    • http://www.vktzunami.cz/images/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.vktzunami.cz/images/roblox-free-items-2021_GM431946152.pdfIn PDF document text
    • http://www.vktzunami.cz/images/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.vktzunami.cz/images/facebook-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://www.vktzunami.cz/images/how-to-hack-roblox-accounts-for-robux_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_off00004a5a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A5A 24704 bytes
SHA-256: 09f867b35918751b7b97e30e8676d1b5ff36bd4c3c8cea373b19e5cc16dba434
font_01_sfnt_off0000828c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x828C 19044 bytes
SHA-256: 3f9aae1fdf8799fca0c9fecd68bec18923aee995b2022bf59fb0518bf5a4831a

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