Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fccd80279376585…

MALICIOUS

PDF

33.8 KB Created: 2021-07-04 01:22:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 53e065a473379cc1d61c751af70124d8 SHA-1: b649c39840ffd6695e408150a673f73e6b0e87d1 SHA-256: 6fccd8027937658531f4086b7fb8deb858d19b39116f602aad786f90f9778836
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to malicious redirector infrastructure, specifically advertising free game currency and hacks for popular games. The ML classifier also flagged this PDF as malicious. The primary attack pattern involves luring users to these malicious sites, likely to deliver further malware or conduct phishing. No scripts were extracted, but the embedded URLs are the main indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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 http://netcdn.tw/app/431946152/www-roblox-com-free-robux-game-hack In PDF document text
    • https://www.ramsburyestates.co.uk/uploads/files/files/is-java-minecraft-free_GM479516143.pdfIn PDF document text
    • https://www.ramsburyestates.co.uk/uploads/files/files/rbl-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://www.ramsburyestates.co.uk/uploads/files/files/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://www.ramsburyestates.co.uk/uploads/files/files/free-minecraft-packs_GM479516143.pdfIn PDF document text
    • https://www.ramsburyestates.co.uk/uploads/files/files/free-robux-today_GM431946152.pdfIn PDF document text
    • https://www.ramsburyestates.co.uk/uploads/files/files/free-robux-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://www.ramsburyestates.co.uk/uploads/files/files/free-robux-obby-2021_GM431946152.pdfIn PDF document text
    • https://www.ramsburyestates.co.uk/uploads/files/files/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • https://www.ramsburyestates.co.uk/uploads/files/files/minecraft-net-download-free_GM479516143.pdfIn PDF document text
    • https://www.ramsburyestates.co.uk/uploads/files/files/hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.ramsburyestates.co.uk/uploads/files/files/how-to-change-your-username-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://www.ramsburyestates.co.uk/uploads/files/files/how-to-get-free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.ramsburyestates.co.uk/uploads/files/files/how-to-get-free-robux-app_GM431946152.pdfIn PDF document text
    • https://www.ramsburyestates.co.uk/uploads/files/files/how-to-hack-into-someones-roblox-account_GM431946152.pdfIn PDF document text
    • https://www.ramsburyestates.co.uk/uploads/files/files/coin-master-unlimited-spin-hack-mod-apk_GM406889139.pdfIn PDF document text
    • https://www.ramsburyestates.co.uk/uploads/files/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://www.ramsburyestates.co.uk/uploads/files/files/free-premium-roblox_GM431946152.pdfIn PDF document text
    • https://www.ramsburyestates.co.uk/uploads/files/files/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.ramsburyestates.co.uk/uploads/files/files/coin-master-free-spins-and-cards_GM406889139.pdfIn PDF document text
    • https://www.ramsburyestates.co.uk/uploads/files/files/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002bea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2BEA 22440 bytes
SHA-256: 340bcd102f05ea78310d8caffb44c90a759fce765a51b9ffc909047ce1658c60
font_01_sfnt_off00005e31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E31 19412 bytes
SHA-256: 9f2d18035413ba33397c677b2581e7e69ab306c490ad5b1efc57e4a607bb5205

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