Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf33d677f2f32629…

MALICIOUS

PDF

35.5 KB Created: 2021-06-25 19:31:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 51ef8452cf0c1b580d7cf3726d37f0f0 SHA-1: e938702e50403b6f691c40988b4179ef1cc06443 SHA-256: bf33d677f2f326299619b00a4dc7623fd4cedb4ed07757f9211f2f7bf2049ec5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one identified as a malicious redirector, that promise game hacks and free currency. The document body and embedded URLs suggest a lure for users interested in games like Roblox and Coin Master. The presence of embedded URLs and the nature of the lures indicate an attempt to redirect users to potentially malicious sites, likely for further exploitation or malware delivery.

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/easy-hacks-of-money-for-rocitizens-roblox-game-hack In PDF document text
    • http://bw.ac.th/userfiles/files/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/how-to-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/free-robux-app_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/download-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/coin-master-daily-free-spins-link-march-2021_GM406889139.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/free-limiteds-roblox_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/get-free-robux-just-by-joining-this-group_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/coin-master-hack-online-download_GM406889139.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/roblox-robux-hack-rar_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/roblox-account-hacker-tool_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/i-want-robux_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/how-to-change-your-name-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/roblox-hack-and-cheats-for-exploit-free-download_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/speed-hack-roblox-with-nopde-engine_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/best-site-for-free-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/minecraft-java-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_off00003242.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3242 22616 bytes
SHA-256: eb8baaff6d9389e31d0e47ede3182ca7d68ece993a216e2280da2be79e42aa85
font_01_sfnt_off000064a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64A0 19504 bytes
SHA-256: 7974856c050d6e8475638ac704372c2c4812f699fe9fd40149d1154dd399c302

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