Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c2f0bdcc38cd377…

MALICIOUS

PDF

34.0 KB Created: 2021-07-09 15:17:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 5de1f22476b08b441156e2acc981cae4 SHA-1: ac84d63f2dd21150f8ad89c98e0b817750345784 SHA-256: 6c2f0bdcc38cd3771f02878f53d55c9fb855bcc3cf55460f70dd4d32f1ef1345
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and embedded text related to 'free Robux' and game hacks, directly linking to a known malicious redirector. The primary lure is designed to trick users into visiting the malicious URL, likely to download further malware or engage in credential harvesting. No scripts were extracted, but the PDF structure and embedded URLs strongly indicate a phishing or malware distribution attempt.

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-free-robux-no-verification-game-hack In PDF document text
    • https://cleansui.com.tw/image/data/files/bloxburg-for-free-on-roblox_GM431946152.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/hack-mods-for-roblox_GM431946152.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/robux-get-com_GM431946152.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/free-coin-master-spins-no-verification_GM406889139.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/tiktok-free-likes-and-views_GM835599320.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/coin-master-free-spins-link-2021-blogger_GM406889139.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/roblox-infinite-health-cheat_GM431946152.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/coin-master-heaven-daily-free-spins-and-coins-links_GM406889139.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/how-to-get-free-bc-and-robux_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/free-pants-roblox-wiki_GM431946152.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/how-to-get-free-robux-on-roblox-studio_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/2021-000000-free-robux_GM431946152.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/coin-master-official-website_GM406889139.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/free-robux-mobile_GM431946152.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/free-roblox-followers_GM431946152.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/play-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/roblox-skin-free_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/roblox-card-generator-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_off00002eb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EB5 21956 bytes
SHA-256: a9a8974fb960cec0951fe9abb4850495745592850b435d1096e3de209ec681d3
font_01_sfnt_off00005f64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F64 19148 bytes
SHA-256: 8dddf83a8dc305c7bfb211f3bc3fbf3b1849d9dcf887b2c8b2fcb602871e3305

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