Malicious PDF — malware analysis report

Static analysis result for SHA-256 976dec7c349ebfbe…

MALICIOUS

PDF

35.1 KB Created: 2021-06-22 16:14:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: db7892a8386933dec82b16cf74a37c2b SHA-1: f00a500958791d1fef7a73db844f256708fbd332 SHA-256: 976dec7c349ebfbe2f33bdc35de5cfbcd838215ad8babe89a7ba35c531e48412
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that lead to a known malicious redirector, specifically advertising 'free Robux scams' and 'game hacks'. The ML classifier also flagged this PDF as malicious. The primary IOC is the redirector URL, which is likely used to funnel victims to further malicious content or phishing pages. No scripts were extracted, but the document's structure and embedded URLs strongly indicate a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.co/app/431946152/free-robux-scams-game-hack In PDF document text
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/free-fire-vs-pubg-tik-tok_GM835599320.pdfIn PDF document text
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/coin-master-free-spins-link-download-ios_GM406889139.pdfIn PDF document text
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/coin-master-fun-hack_GM406889139.pdfIn PDF document text
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/hack-spin-coin-master_GM406889139.pdfIn PDF document text
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/apps-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/universal-minecraft-converter-free_GM479516143.pdfIn PDF document text
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/robux-get-com_GM431946152.pdfIn PDF document text
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/coin-master-free-spins-link-2021-app_GM406889139.pdfIn PDF document text
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/hacks-para-roblox_GM431946152.pdfIn PDF document text
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/gamehunters-club-coin-master_GM406889139.pdfIn PDF document text
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/free-robux-no-apps_GM431946152.pdfIn PDF document text
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/roblox-premium-free_GM431946152.pdfIn PDF document text
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/www-roblox-com-robux_GM431946152.pdfIn PDF document text
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/minecraft-java-edition-free-download_GM479516143.pdfIn PDF document text
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/is-minecraft-free-on-xbox_GM479516143.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_off000031de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31DE 22604 bytes
SHA-256: 4d30dba404e4dc510a65d935ac4c8e9955d7b5eaf72266539de98585a8db7362
font_01_sfnt_off00006498.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6498 18976 bytes
SHA-256: 48eef6298bef607355aca425a8072928fe0e0a0bc0ee660e64f251d9c93ff6b2

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