Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6f5d820a55deaac…

MALICIOUS

PDF

35.7 KB Created: 2021-06-29 10:29:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: edb97be82f22eeeb8a7203273d58986e SHA-1: e25c01aa0de68c64d425c60154e8a0a06549cfae SHA-256: e6f5d820a55deaac7ff5f3a0989b70ae8d4f71e241fd9b4fdad5cd74abef9d26
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors and game hack lures, specifically targeting Roblox and Coin Master. The primary link, http://netcdn.co/app/431946152/roblox-cheat-engine-robux-download-game-hack, is identified as a malicious redirector. The document body and embedded URLs suggest a social engineering tactic to trick users into downloading potentially unwanted or malicious software. No scripts were extracted from this sample.

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/roblox-cheat-engine-robux-download-game-hack In PDF document text
    • https://www.99champions.com/uploaded_files/userfiles/files/roblox-land-free-robux_GM431946152.pdfIn PDF document text
    • https://www.99champions.com/uploaded_files/userfiles/files/free-cool-clothes-roblox_GM431946152.pdfIn PDF document text
    • https://www.99champions.com/uploaded_files/userfiles/files/www-bandicam-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.99champions.com/uploaded_files/userfiles/files/coin-master-hack-extension_GM406889139.pdfIn PDF document text
    • https://www.99champions.com/uploaded_files/userfiles/files/how-to-play-minecraft-for-free-on-computer_GM479516143.pdfIn PDF document text
    • https://www.99champions.com/uploaded_files/userfiles/files/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • https://www.99champions.com/uploaded_files/userfiles/files/roblox-devil_GM431946152.pdfIn PDF document text
    • https://www.99champions.com/uploaded_files/userfiles/files/hack-roblox-free-download_GM431946152.pdfIn PDF document text
    • https://www.99champions.com/uploaded_files/userfiles/files/site-de-hack-roblox_GM431946152.pdfIn PDF document text
    • https://www.99champions.com/uploaded_files/userfiles/files/free-robux-videos_GM431946152.pdfIn PDF document text
    • https://www.99champions.com/uploaded_files/userfiles/files/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.99champions.com/uploaded_files/userfiles/files/stealer-hack-roblox_GM431946152.pdfIn PDF document text
    • https://www.99champions.com/uploaded_files/userfiles/files/robux-win_GM431946152.pdfIn PDF document text
    • https://www.99champions.com/uploaded_files/userfiles/files/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • https://www.99champions.com/uploaded_files/userfiles/files/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • https://www.99champions.com/uploaded_files/userfiles/files/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.99champions.com/uploaded_files/userfiles/files/robux-for-surveys_GM431946152.pdfIn PDF document text
    • https://www.99champions.com/uploaded_files/userfiles/files/free-robux-no-personal-information_GM431946152.pdfIn PDF document text
    • https://www.99champions.com/uploaded_files/userfiles/files/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://www.99champions.com/uploaded_files/userfiles/files/roblox-robux-codes-free-2021_GM431946152.pdfIn PDF document text
    • https://www.roblox.com/my/tasksIn 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_off0000316d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x316D 22928 bytes
SHA-256: 485075bb715636f8cd73fd3439fb21bbee6cedaf3f2485a3469f68b8c230726a
font_01_sfnt_off000064fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64FB 19524 bytes
SHA-256: d28028779bdd43fd156a3d1c7ceec7b63c972e9a6e70ab4b6ddc2cae2f45625c

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