Malicious PDF — malware analysis report

Static analysis result for SHA-256 7507c8b5355eede8…

MALICIOUS

PDF

35.6 KB Created: 2021-06-19 06:16:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 938c516500e055f51e34b51a21104615 SHA-1: 73d504ab1c8cf139b11b4206e7fff9636402fa3d SHA-256: 7507c8b5355eede88cee52049a40421acf8c4e6919617f0bec4b6e68bfc28b3e
160 Risk Score

Malware Insights

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

This PDF document contains multiple links that redirect to malicious infrastructure, masquerading as game hacks. The primary lure is a link to 'Hack Para Roblox De Robux 2021', which points to http://netcdn.co/app/431946152/hack-para-roblox-de-robux-2021-game-hack. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful 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/hack-para-roblox-de-robux-2021-game-hack In PDF document text
    • http://repository.ummy.ac.id//repository/minecraft-net-download-free_GM479516143.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/how-to-get-free-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/minecraft-font-free_GM479516143.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/fly-hack-roblox-script_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/roblox-hack-official-site_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/coin-master-apk-hack-download_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/free-robux-apk_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/hack-robux-ohne-cheat-engine_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/earn-robux-online_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/uirbx-club-roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/rbx-roblox-robux_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/free-roblox-hack_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/i-got-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/roblox-games-that-cheat-engine-works-on_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/how-o-hack-roblox-trackid-sp006_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_off000032f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32F0 22488 bytes
SHA-256: 720ffbc40f6266f525c4ae2d8a5a56e6734136feb77ad3a480ded1e1915cafa2
font_01_sfnt_off000064ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64AB 19520 bytes
SHA-256: d7a979142d0bfe6eef05566969d9eb372a74b31f53ca6238af90b4e37c621365

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