Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f0d51e2287e7e51…

MALICIOUS

PDF

34.5 KB Created: 2021-06-25 23:54:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c15c8410031ee338365143ac96212f10 SHA-1: a6149a6e6c924dee818c1ca38eac2a1dbafb9f62 SHA-256: 9f0d51e2287e7e5183c5d041d4282f99b82fcb44daba7a8092d623fba2668d12
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'robux generators'. The primary lure appears to be a fake generator for the game Robux, directing users to the URL http://netcdn.co/app/431946152/is-the-game-robux-hacked-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a social engineering attack aimed at tricking users into visiting potentially harmful sites.

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/is-the-game-robux-hacked-game-hack In PDF document text
    • http://pustaka.ust.ac.id/repository/free-for-mobile-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/roblox-jailbreak-hack-client_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/real-coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-roblox-items-on-catalog_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-robux-hack-no-survey_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/minecraft-cheats-switch_GM479516143.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-do-u-hack-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/minecraft-pe-texture-packs-free-download_GM479516143.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/code-cheater-unboxing-simulator-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/boku-no-roblox-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-coin-master-spins-blog_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/hack-roblox-vehicle-simulator-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/roblox-hide-and-seek-extreme-cheats_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/tiktok-likes-free-trial_GM835599320.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/money-cheats-for-roblox-vehicle-simulator_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/roblox-hack-script-penis_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_off00002fac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FAC 22312 bytes
SHA-256: 628e033bd6d38cacec0c29f35df633889ff41c29a8ced93f3d50271fd3ce3b3a
font_01_sfnt_off000060fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60FD 19320 bytes
SHA-256: 00ebeeac84bb01d91b0cdd1368380f16e2d7587cdd2edcdc8247607f6416673a

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