Malicious PDF — malware analysis report

Static analysis result for SHA-256 2efe2b8509df302f…

MALICIOUS

PDF

31.2 KB Created: 2021-06-26 03:53:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 6dd52b50c969d9b19a677649ce0bac29 SHA-1: de3de487ee744c9e854ed1b2eb7458871bb29f6f SHA-256: 2efe2b8509df302f8eca7da3cf6cc9cf1b53993500f4ed7564d64429cbd04afd
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to redirector infrastructure, specifically promoting 'free generators' and 'hacks' for the game Roblox. These links are designed to lure users to potentially malicious websites. The ML classifier strongly indicated maliciousness, and the embedded URLs are associated with known malicious redirectors.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 3

  • 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.
  • 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/jailbreak-roblox-hack-2021-february-game-hack In PDF document text
    • http://library.futureuniversity.com/repository/cheat-roblox-tower-battle_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/como-hackear-roblox-adopt-me-2021_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/como-hacker-roblox_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/how-to-get-free-robux-without-surveys-2021_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/microsoft-roblox-rewards_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/robloxgiveaways-top-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/how-to-hack-roblox-servers-2021_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/best-forntinte-games-om-roblox-no-robux-free_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/roblox-army-free-robux_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/roblox-robux-hack-online-generator-tool-no-download_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/but-link-says-free-robux_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/how-to-get-free-marshmallows-in-backpacking-roblox_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/how-to-make-clothes-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/how-to-get-free-robux-on-mac-2021_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/hacks-master-coin_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/how-do-you-hack-roblox-galaxy_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/roblox-wikipedia-2021-hack_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/minecraft-free-edition_GM479516143.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/bad-minecraft-free_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003029.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3029 22484 bytes
SHA-256: 61b7a76d8476b304eecdec7838e727088283735167943fecaeafb460ed443d82

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