Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c84a456c81a5564…

MALICIOUS

PDF

34.9 KB Created: 2021-06-20 02:05:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 061066c3334f982212f10798c83bd5e7 SHA-1: debf6a7bbcae66898aaeaefe65f06457a2575d2b SHA-256: 5c84a456c81a5564021e4f906d1930c80c79396022bc6364c9e1b61bb42657cb
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to malicious infrastructure, specifically promoting 'free generator / game hack' lures. The ML classifier strongly indicated maliciousness, and the presence of multiple redirector links confirms a malicious workflow. Although no scripts were extracted, the document's structure and embedded URLs suggest it's designed to trick users into visiting potentially harmful sites.

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/earn-free-points-for-robux-game-hack In PDF document text
    • https://www.hagleygolfclub.co.uk/admin/ckfinder/userfiles/files/hack-coin-master-online_GM406889139.pdfIn PDF document text
    • https://www.hagleygolfclub.co.uk/admin/ckfinder/userfiles/files/how-to-change-your-username-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://www.hagleygolfclub.co.uk/admin/ckfinder/userfiles/files/minecraft-pe-apk-free-download_GM479516143.pdfIn PDF document text
    • https://www.hagleygolfclub.co.uk/admin/ckfinder/userfiles/files/coin-master-pet-food-free_GM406889139.pdfIn PDF document text
    • https://www.hagleygolfclub.co.uk/admin/ckfinder/userfiles/files/coin-master-links-that-don-t-expire_GM406889139.pdfIn PDF document text
    • https://www.hagleygolfclub.co.uk/admin/ckfinder/userfiles/files/coinmasterdailyfreespins-com_GM406889139.pdfIn PDF document text
    • https://www.hagleygolfclub.co.uk/admin/ckfinder/userfiles/files/real-robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://www.hagleygolfclub.co.uk/admin/ckfinder/userfiles/files/free-coin-master-spins-no-verification_GM406889139.pdfIn PDF document text
    • https://www.hagleygolfclub.co.uk/admin/ckfinder/userfiles/files/coin-master-free-spons-apk-2021_GM406889139.pdfIn PDF document text
    • https://www.hagleygolfclub.co.uk/admin/ckfinder/userfiles/files/coin-master-hack-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • https://www.hagleygolfclub.co.uk/admin/ckfinder/userfiles/files/free-draw-roblox_GM431946152.pdfIn PDF document text
    • https://www.hagleygolfclub.co.uk/admin/ckfinder/userfiles/files/free-executors-for-roblox_GM431946152.pdfIn PDF document text
    • https://www.hagleygolfclub.co.uk/admin/ckfinder/userfiles/files/free-robux-script_GM431946152.pdfIn PDF document text
    • https://www.hagleygolfclub.co.uk/admin/ckfinder/userfiles/files/free-online-robux-generator-no-download_GM431946152.pdfIn PDF document text
    • https://www.hagleygolfclub.co.uk/admin/ckfinder/userfiles/files/minecraft-bedrock-edition-download-pc-free_GM479516143.pdfIn PDF document text
    • https://www.hagleygolfclub.co.uk/admin/ckfinder/userfiles/files/assain-2-hack-roblox_GM431946152.pdfIn PDF document text
    • https://www.hagleygolfclub.co.uk/admin/ckfinder/userfiles/files/coin-master-free-spins-and-coins-for-iphone_GM406889139.pdfIn PDF document text
    • https://www.hagleygolfclub.co.uk/admin/ckfinder/userfiles/files/tiktok-free-robux_GM835599320.pdfIn PDF document text
    • https://www.hagleygolfclub.co.uk/admin/ckfinder/userfiles/files/how-to-get-free-robux-on-pc_GM431946152.pdfIn PDF document text
    • https://www.hagleygolfclub.co.uk/admin/ckfinder/userfiles/files/robux-generator-no-human-verification-or-survey_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
font_00_sfnt_off00003104.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3104 22748 bytes
SHA-256: 6cca6c35dc7404349f6d91d44c1d938b9fe2cbfda2fcc23809cf476704bbcf9b
font_01_sfnt_off00006374.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6374 19092 bytes
SHA-256: c41dc5e952270b502eeda26a40d3b8b1fe18365c8900792c0d603fbd51a6ba9f

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