Malicious PDF — malware analysis report

Static analysis result for SHA-256 569d3a22c5e1548e…

MALICIOUS

PDF

35.0 KB Created: 2021-06-21 22:12:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 854664463945bbc871a43f8542115fbb SHA-1: 59897eecf8006529576702a7fc769ebe9f00c55c SHA-256: 569d3a22c5e1548eaaf881fa48bb8e7df37718317872df08898122ad38dd49bd
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, disguised as "game hacks" and "free currency generators" for popular games. The primary URL http://netcdn.co/app/431946152/best-roblox-jailbreak-hack-2021-mod-menu-game-hack is identified as a malicious redirector. The document body and embedded URLs suggest a lure for users seeking cheats or exploits, which is a common tactic for distributing malware or leading to phishing sites. No scripts were extracted, but the presence of malicious links and the ML classifier's high confidence indicate a high likelihood of malicious intent.

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/best-roblox-jailbreak-hack-2021-mod-menu-game-hack In PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/how-to-get-free-likes-on-tiktok_GM835599320.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/new-hack-jailbreak-roblox_GM431946152.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/coin-master-hack-no-root_GM406889139.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/master-coin-free-link_GM406889139.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/free-robux-no-password_GM431946152.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/free-tiktok-followers-no-human-verification_GM835599320.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/rolblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/coin-master-link-daily-get-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/minecraft-launcher-free_GM479516143.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/minecraft-apk-114-4_GM479516143.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/free-robux-easy_GM431946152.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/boku-no-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/cheats-de-ben-10-universal-showdown-roblox_GM431946152.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/minecraft-net-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_off00002fee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FEE 22208 bytes
SHA-256: 029dcde466972b240432715044e772f335b870294b60edeb95bd0e028e735400
font_01_sfnt_off00006111.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6111 19956 bytes
SHA-256: 031e8fe0bc3876b6866ba2a6ad6c595e61aac22886684d5494ef9c0f3ce6badb

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