Malicious PDF — malware analysis report

Static analysis result for SHA-256 440a7e4c805f3526…

MALICIOUS

PDF

32.8 KB Created: 2021-06-28 16:36:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: ffd2a219e5ab7e6285c54531a72a7a39 SHA-1: d51541207502032dd280b77d197be085910d8932 SHA-256: 440a7e4c805f352625ae10eb6d49ffce74ecef99ddad03a3f95155b25beccee2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to 'game hacks' and 'robux generators' to entice users. It contains multiple embedded URLs, including a primary redirector at http://netcdn.co/app/431946152/how-to-be-a-hacker-in-roblox-2021-game-hack, which is flagged as malicious. The document's structure and content suggest it is designed to lead users to potentially harmful websites, likely for malware distribution or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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-to-be-a-hacker-in-roblox-2021-game-hack In PDF document text
    • http://repository.ummy.ac.id/repository/how-to-get-cloth-goku-ui-free-roblox_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/hello-neighbor-roblox-free-download_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/free-roblox-exploit-scripts-for-executor_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/roblox-hack-download-2021-android_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/robux-hack-tool-download-2021_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/hack-roblox-jailbreak-espaol_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/royalty-free-roblox-background-forest_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/roblox-tycoon-games-hacked_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/dbr-roblox-hack_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/robux-online_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/how-to-get-free-robux-robux-generator_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/coin-master-cheats-free_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/does-cheat-engine-work-on-roblox_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/how-to-get-free-robux-2021-with-no-inspection_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/minecraft-hacks-wurst_GM479516143.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/free-robux-games-on-ipad_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/roblox-survey-for-robux_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_off00002a7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A7F 21764 bytes
SHA-256: b394ef625675e6d8cf8c7eebbe6b541dcf550f58348bc51f97627acdd47d1cd1
font_01_sfnt_off00005a92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A92 19224 bytes
SHA-256: 0ef1f8f4d1b4a5cba02207f39a7af8ec5b7f2d46e247f465de52eeca4861bf83

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