Malicious PDF — malware analysis report

Static analysis result for SHA-256 810df0c6c63b071e…

MALICIOUS

PDF

48.5 KB Created: 2021-06-02 19:51:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 28c32f9338679990177c9cecd4ddebad SHA-1: 3acf72c474f843d4154b280deeb5825171448800 SHA-256: 810df0c6c63b071e769df2b01e967d24594521e6fb672dce15f66530a2796b85
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links to known malicious redirectors, specifically advertising 'free generators' and 'game hacks' for popular titles like Roblox. The document body, though heavily obfuscated, contains references to these lures and embedded URLs. The presence of these links and the heuristic firings strongly suggest an attempt to trick users into visiting malicious sites, likely to download further malware or engage in phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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 https://netcdn.xyz/app/431946152/roblox-cheat-engine-hacks-admin-script-game-hack In PDF document text
    • http://deyuan-pc.com.tw/images/minecraft-hack-client-download_GM479516143.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/coin-master-hack-root_GM406889139.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/roblox-robux-page_GM431946152.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/how-to-get-free-tiktok-likes_GM835599320.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/free-roblox-avatar_GM431946152.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/free-robux-sites-no-verification_GM431946152.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/download-coin-master-apk-hack_GM406889139.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/como-hackear-coin-master_GM406889139.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/free-promo-codes-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/free-roblox-clothes-codes_GM431946152.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/free-spins-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/minecraft-free-download-chromebook_GM479516143.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/minecraft-multiplayer-free_GM479516143.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/free-generator_GM431946152.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000050f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x50F9 25180 bytes
SHA-256: 9496d9bf709d4f9a3e8ad1bd87a81db026c2b1825643e02ca8e82773655d81a8
font_01_sfnt_off00008a49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A49 3944 bytes
SHA-256: 9d541c1135e7f214f2c0ee9f80d56d20924925e08806625073b6c26067494a41
font_02_sfnt_off0000973d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x973D 19468 bytes
SHA-256: eefba0cb8cb8536e349b1dfebb727aa0d62a87d877512319ede13b306507df14

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