Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc27a33ce543cd09…

MALICIOUS

PDF

33.5 KB Created: 2021-07-04 10:08:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f7f2fb117290998f72683d1e32a8f257 SHA-1: 6a24ef32382976c56986485db878819f39689329 SHA-256: cc27a33ce543cd09ac98e243b2d11d9492827fd881ef6a300a9c2f6ea9420501
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to a known malicious redirector infrastructure at http://netcdn.tw/app/431946152/roblox-com-free-play-game-hack. This redirector is likely used to deliver a second-stage payload or phish for credentials. The document body and embedded URLs suggest a lure related to game hacks and in-game currency.

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.tw/app/431946152/roblox-com-free-play-game-hack In PDF document text
    • https://www.wco.org.uk/uploads/files/files/roblox-free-robux-2021-hack_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/free-robux-redeem-codes_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/coin-master-hack-355_GM406889139.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/coin-master-hack-program_GM406889139.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/get-free-promo-codes-in-roblox_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/how-to-get-free-robux-on-roblox-app_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/how-to-get-free-robux-no-verifaction-or-servey_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/coin-master-online-hack-link_GM406889139.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/how-to-change-username-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/how-to-get-coin-master-free-spins-in-email_GM406889139.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/free-hair-roblox-boy_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/hack-roblox-transformaciones_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/coin-master-unlimited-free-spins_GM406889139.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/how-to-send-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/bux-free-robux_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/robux-today_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/da-hood-roblox-hack-script_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/free-robux-no-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/coin-master-free-spins-links-app_GM406889139.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_off00002d29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D29 21856 bytes
SHA-256: ed1ad30e6cdd369bbe95ae34c84eb784672e383f00b8f636ada05bed7cadab79
font_01_sfnt_off00005d4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D4A 19244 bytes
SHA-256: 757b6080daffd378f956ea9d87277f97d9d8e28a161ab3cdc6c6420d2ff89f96

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