Malicious PDF — malware analysis report

Static analysis result for SHA-256 80e8a10e3c67b123…

MALICIOUS

PDF

35.0 KB Created: 2021-07-10 00:38:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 4b65abd85b97a1993b2aa08ed9e0e38d SHA-1: c8796aeec34d369e2e8d8d7ffeef855dc9dbb082 SHA-256: 80e8a10e3c67b123c0cf6fe7c025678d84a5c2a598c5ea8ed3eb4d8148c9fc5a
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/free-robux-without-downloading-anything-game-hack. The document body and heuristics indicate a lure for free game currency or hacks, a common tactic for distributing malware or leading to phishing sites. No scripts were extracted, but the embedded URLs and the nature of the lure strongly suggest a malicious intent to redirect users to harmful content.

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/free-robux-without-downloading-anything-game-hack In PDF document text
    • http://www.chitfund.com/uploaded_files/userfiles/files/roblox-shinobi-life-free-spins-2021_GM431946152.pdfIn PDF document text
    • http://www.chitfund.com/uploaded_files/userfiles/files/how-to-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.chitfund.com/uploaded_files/userfiles/files/free-robux-without-buying-something-with-a-email-address_GM431946152.pdfIn PDF document text
    • http://www.chitfund.com/uploaded_files/userfiles/files/http-lazyassgamercom-robloxhackrobuxgenerator_GM431946152.pdfIn PDF document text
    • http://www.chitfund.com/uploaded_files/userfiles/files/hacks-and-cheats-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.chitfund.com/uploaded_files/userfiles/files/how-to-run-fast-in-roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.chitfund.com/uploaded_files/userfiles/files/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.chitfund.com/uploaded_files/userfiles/files/how-to-get-free-robux-games_GM431946152.pdfIn PDF document text
    • http://www.chitfund.com/uploaded_files/userfiles/files/minecraft-noob-vs-pro-vs-hacker-vs-god_GM479516143.pdfIn PDF document text
    • https://chitfund.com/uploaded_files/userfiles/files/how-to-get-free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://chitfund.com/uploaded_files/userfiles/files/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • https://chitfund.com/uploaded_files/userfiles/files/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • https://chitfund.com/uploaded_files/userfiles/files/coin-master-free-spins-and-free-coins_GM406889139.pdfIn PDF document text
    • http://www.chitfund.com/uploaded_files/userfiles/files/tampermonkey-robux-hack-that-works_GM431946152.pdfIn PDF document text
    • http://www.chitfund.com/uploaded_files/userfiles/files/roblox-cheat-command-code_GM431946152.pdfIn PDF document text
    • https://chitfund.com/uploaded_files/userfiles/files/roblox-script-hack_GM431946152.pdfIn PDF document text
    • http://www.chitfund.com/uploaded_files/userfiles/files/roblox-dominus-free_GM431946152.pdfIn PDF document text
    • https://chitfund.com/uploaded_files/userfiles/files/coin-master-hack-tool-ios_GM406889139.pdfIn PDF document text
    • https://chitfund.com/uploaded_files/userfiles/files/minecraft-free-download-pc_GM479516143.pdfIn PDF document text
    • http://www.chitfund.com/uploaded_files/userfiles/files/minecraft-apk-download-v1-144-2-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_off0000308d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x308D 21768 bytes
SHA-256: 7f16170b0ef056193bacceecbba6bc084e678b395275bec6b0d0c09b5fa7d52d
font_01_sfnt_off000060bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60BC 20064 bytes
SHA-256: 4b9c18d9a006b22bcf5f0b8ca3ed5b82c179739203e5b30b6354743aff3950b6

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