Malicious PDF — malware analysis report

Static analysis result for SHA-256 988c902787e954c0…

MALICIOUS

PDF

45.1 KB Created: 2021-06-10 22:05:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 16b49ef2af985a00649eecc49e36261b SHA-1: aafc4c94730a0aaed783b62972836eb6c51af2fe SHA-256: 988c902787e954c041661b583bc54acc5563d23eddfe145bb55ff2802736c1d9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector infrastructure, disguised as "game hacks" and "generators". The primary lure URL is https://netcdn.tw/app/431946152/how-to-spawn-models-in-roblox-with-hack-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate malicious redirection, likely leading to a second-stage download or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.tw/app/431946152/how-to-spawn-models-in-roblox-with-hack-game-hack In PDF document text
    • https://www.nordicstar.co.uk/uploads/files/files/hack-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.nordicstar.co.uk/uploads/files/files/minecraft-xbox-one-code-free_GM479516143.pdfIn PDF document text
    • https://www.nordicstar.co.uk/uploads/files/files/free-robux-obby-2021_GM431946152.pdfIn PDF document text
    • https://www.nordicstar.co.uk/uploads/files/files/how-to-hack-coin-master-spin_GM406889139.pdfIn PDF document text
    • https://www.nordicstar.co.uk/uploads/files/files/roblox-hack-client_GM431946152.pdfIn PDF document text
    • https://www.nordicstar.co.uk/uploads/files/files/roblox-btools-hack-script_GM431946152.pdfIn PDF document text
    • https://www.nordicstar.co.uk/uploads/files/files/minecraft-skins-download-free_GM479516143.pdfIn PDF document text
    • https://www.nordicstar.co.uk/uploads/files/files/how-to-hack-someone-on-roblox-easy_GM431946152.pdfIn PDF document text
    • https://www.nordicstar.co.uk/uploads/files/files/pubg-uc-carding-telegram_GM1330123889.pdfIn PDF document text
    • https://www.nordicstar.co.uk/uploads/files/files/free-robux-on-phone_GM431946152.pdfIn PDF document text
    • https://www.nordicstar.co.uk/uploads/files/files/coin-master-heaven_GM406889139.pdfIn PDF document text
    • https://www.nordicstar.co.uk/uploads/files/files/coin-master-com_GM406889139.pdfIn PDF document text
    • https://www.nordicstar.co.uk/uploads/files/files/coin-master-daily-free-spins-hack_GM406889139.pdfIn PDF document text
    • https://www.nordicstar.co.uk/uploads/files/files/minecraft-cracked-client_GM479516143.pdfIn PDF document text
    • https://www.nordicstar.co.uk/uploads/files/files/roblox-free-robux_GM431946152.pdfIn PDF document text
    • https://www.nordicstar.co.uk/uploads/files/files/free-disney-plus-accounts-tiktok_GM835599320.pdfIn PDF document text
    • https://www.nordicstar.co.uk/uploads/files/files/coin-master-hack-game-download-mod-apk_GM406889139.pdfIn PDF document text
    • https://www.nordicstar.co.uk/uploads/files/files/get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.nordicstar.co.uk/uploads/files/files/coin-master-34-6-hack_GM406889139.pdfIn PDF document text
    • https://www.nordicstar.co.uk/uploads/files/files/roblox-script-hack_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_off00004ef7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4EF7 26724 bytes
SHA-256: 5b064ec9a8afe3526b79c96a6277e2d7ffaa58e4cd0ab88c7ec0e367b7f9c45a
font_01_sfnt_off00008a14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A14 19480 bytes
SHA-256: a806668c7ecdd6b87d884b692dfb0ad3559ec2155718f10465466152849f0967

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