Malicious PDF — malware analysis report

Static analysis result for SHA-256 42a26d1876eb231e…

MALICIOUS

PDF

34.8 KB Created: 2021-06-20 20:35:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 234f936128388addf58eed5a4ecc2d20 SHA-1: 91f88602094d9143f26f149d6b3f71a9c6ae9187 SHA-256: 42a26d1876eb231e5e0d0823a8827f8e62f7ec4859c53926e110fa06e83de312
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and game hack lures, indicating a phishing or scam attempt. The embedded URLs, such as http://netcdn.co/app/431946152/how-do-you-get-free-robux-on-roblox-on-ipad-game-hack, are designed to trick users into visiting potentially harmful websites. No scripts were extracted, but the document's structure and embedded URLs strongly suggest a malicious intent to redirect users to malicious content.

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/how-do-you-get-free-robux-on-roblox-on-ipad-game-hack In PDF document text
    • http://grupodin.com.br/images/free-coin-master-spins-blog_GM406889139.pdfIn PDF document text
    • http://grupodin.com.br/images/dominus-hat-roblox-free_GM431946152.pdfIn PDF document text
    • http://grupodin.com.br/images/coin-master-links-for-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://grupodin.com.br/images/is-there-any-tricks-or-working-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • http://grupodin.com.br/images/how-to-use-roblox-hack-tool_GM431946152.pdfIn PDF document text
    • http://grupodin.com.br/images/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • http://grupodin.com.br/images/minecraft-cheats-pc-2021_GM479516143.pdfIn PDF document text
    • http://grupodin.com.br/images/minecraft-tower-defense-hacked_GM479516143.pdfIn PDF document text
    • http://grupodin.com.br/images/coin-master-support_GM406889139.pdfIn PDF document text
    • http://grupodin.com.br/images/free-robux-rblx-market_GM431946152.pdfIn PDF document text
    • http://grupodin.com.br/images/roblox-grand-crossing-roleplay-hack_GM431946152.pdfIn PDF document text
    • http://grupodin.com.br/images/how-do-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://grupodin.com.br/images/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • http://grupodin.com.br/images/cool-backgrounds-roblox-free_GM431946152.pdfIn PDF document text
    • http://grupodin.com.br/images/roblox-google-free-items_GM431946152.pdfIn PDF document text
    • http://grupodin.com.br/images/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
    • http://grupodin.com.br/images/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://grupodin.com.br/images/minecraft-svg-free_GM479516143.pdfIn PDF document text
    • http://grupodin.com.br/images/how-to-get-free-unlimited-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://grupodin.com.br/images/how-to-get-minecraft-for-free-on-mobile_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_off00003036.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3036 21848 bytes
SHA-256: 7196c91db06be1f0b4bcc7537a93e22fd8ca698418ee8e13883668657f19198c
font_01_sfnt_off000060a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60A6 19736 bytes
SHA-256: ce5e6574854ddab9c97661873f5dd9abb27a7b25a6e02255d1fa01f1ab954ae8

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