Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd8dbc12d7ceba31…

MALICIOUS

PDF

34.3 KB Created: 2021-07-09 03:38:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 3c032fef3761029507bdfca903816a45 SHA-1: 2bef156213da55c51d024d65f764194aea50fce3 SHA-256: bd8dbc12d7ceba31bb28b660a6eea4383688fb6ddde88641d159e094cd1cdaca
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links pointing to redirectors and pages offering game hacks, such as 'roblox-script-hacks-game-hack'. These links are indicative of a lure to download potentially malicious content or engage in phishing. The ML classifier also strongly flagged this PDF as malicious.

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-script-hacks-game-hack In PDF document text
    • http://www.area-tlc.com/public/ckfinder/userfiles/files/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • http://www.area-tlc.com/public/ckfinder/userfiles/files/hack-roblox-online_GM431946152.pdfIn PDF document text
    • http://www.area-tlc.com/public/ckfinder/userfiles/files/free-roblox-gidt-cards_GM431946152.pdfIn PDF document text
    • http://www.area-tlc.com/public/ckfinder/userfiles/files/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://www.area-tlc.com/public/ckfinder/userfiles/files/coin-master-free-spins-link-download-apk_GM406889139.pdfIn PDF document text
    • http://www.area-tlc.com/public/ckfinder/userfiles/files/free-spins-and-coins-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://www.area-tlc.com/public/ckfinder/userfiles/files/telecharger-hack-roblox_GM431946152.pdfIn PDF document text
    • http://www.area-tlc.com/public/ckfinder/userfiles/files/legit-coin-master-hack-october-2021_GM406889139.pdfIn PDF document text
    • http://www.area-tlc.com/public/ckfinder/userfiles/files/free-magical-chest-coin-master_GM406889139.pdfIn PDF document text
    • http://www.area-tlc.com/public/ckfinder/userfiles/files/coin-master-free-spins-link-download-hack_GM406889139.pdfIn PDF document text
    • http://www.area-tlc.com/public/ckfinder/userfiles/files/robux-only_GM431946152.pdfIn PDF document text
    • http://www.area-tlc.com/public/ckfinder/userfiles/files/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
    • http://www.area-tlc.com/public/ckfinder/userfiles/files/roblox-premium-free_GM431946152.pdfIn PDF document text
    • http://www.area-tlc.com/public/ckfinder/userfiles/files/free-coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://www.area-tlc.com/public/ckfinder/userfiles/files/can-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://www.area-tlc.com/public/ckfinder/userfiles/files/master-coins-free_GM406889139.pdfIn PDF document text
    • http://www.area-tlc.com/public/ckfinder/userfiles/files/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.area-tlc.com/public/ckfinder/userfiles/files/free-spins-coin-master-apple_GM406889139.pdfIn PDF document text
    • http://www.area-tlc.com/public/ckfinder/userfiles/files/best-free-spins-link-coin-master_GM406889139.pdfIn PDF document text
    • http://www.area-tlc.com/public/ckfinder/userfiles/files/how-to-get-free-robux-without-hacking-2021_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_off00003160.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3160 21584 bytes
SHA-256: b9fec2b88e3770d16a313d79c074161b4a58b4c2e0233d384a75564cf4bccd44
font_01_sfnt_off000060d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60D9 19056 bytes
SHA-256: d579aac1d1158a15ad46381a3b3d03b5c9b37299ce5790291e99ad749e5be703

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