Malicious PDF — malware analysis report

Static analysis result for SHA-256 e631aeaf640d4a4e…

MALICIOUS

PDF

35.1 KB Created: 2021-06-20 00:16:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 48c2798709a032912343da1d63ce1767 SHA-1: b414be9034e877a25214f2a065216761a6454f53 SHA-256: e631aeaf640d4a4e6d9070df8e8bc9cc7b15490a42896605be6925fe12c4acb8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for game hacks and generators, directing users to a known malicious redirector. The embedded URLs and document body text strongly suggest a phishing or scam attempt designed to trick users into visiting malicious sites. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious intent.

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/roblox-free-rubox-game-hack In PDF document text
    • https://www.poc-helmet.com/ckfinder/userfiles/files/minecraft-free-android_GM479516143.pdfIn PDF document text
    • https://www.poc-helmet.com/ckfinder/userfiles/files/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • https://www.poc-helmet.com/ckfinder/userfiles/files/roblox-free-pants_GM431946152.pdfIn PDF document text
    • https://www.poc-helmet.com/ckfinder/userfiles/files/robloxheroxyz-free-robux_GM431946152.pdfIn PDF document text
    • https://www.poc-helmet.com/ckfinder/userfiles/files/free-coin-master-hacks-no-verification-or-survey_GM406889139.pdfIn PDF document text
    • https://www.poc-helmet.com/ckfinder/userfiles/files/coin-master-35-16-hack-apk_GM406889139.pdfIn PDF document text
    • https://www.poc-helmet.com/ckfinder/userfiles/files/free-roblox-pin-codes_GM431946152.pdfIn PDF document text
    • https://www.poc-helmet.com/ckfinder/userfiles/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.poc-helmet.com/ckfinder/userfiles/files/blogspot-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.poc-helmet.com/ckfinder/userfiles/files/how-do-you-hack-roblox_GM431946152.pdfIn PDF document text
    • https://www.poc-helmet.com/ckfinder/userfiles/files/free-robux-net_GM431946152.pdfIn PDF document text
    • https://www.poc-helmet.com/ckfinder/userfiles/files/tiktok-free-view-jio-phone_GM835599320.pdfIn PDF document text
    • https://www.poc-helmet.com/ckfinder/userfiles/files/roblox-obby-gives-you-robux-for-free-no-password-required_GM431946152.pdfIn PDF document text
    • https://www.poc-helmet.com/ckfinder/userfiles/files/free-robux-on-phone_GM431946152.pdfIn PDF document text
    • https://www.poc-helmet.com/ckfinder/userfiles/files/freer-tiktok_GM835599320.pdfIn PDF document text
    • https://www.poc-helmet.com/ckfinder/userfiles/files/how-to-hack-zombie-rush-roblox_GM431946152.pdfIn PDF document text
    • https://www.poc-helmet.com/ckfinder/userfiles/files/free-appsfor-coin-master-daily-rewards_GM406889139.pdfIn PDF document text
    • https://www.poc-helmet.com/ckfinder/userfiles/files/roblox-builders-club-free_GM431946152.pdfIn PDF document text
    • https://www.poc-helmet.com/ckfinder/userfiles/files/pubg-uc-apk_GM1330123889.pdfIn PDF document text
    • https://www.poc-helmet.com/ckfinder/userfiles/files/minecraft-creative-mode-free_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_off00003168.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3168 22896 bytes
SHA-256: bf3a9d9232733b2ca4a7240eee8c337542a71fa0ca48a5424f19fd0017aa36c8
font_01_sfnt_off000064ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64FF 18788 bytes
SHA-256: 240f26960413d3375b32b54d3a16c3eb3bd7324ec8649811f17e0fe1da2802cb

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