Malicious PDF — malware analysis report

Static analysis result for SHA-256 6413bc96b74d5371…

MALICIOUS

PDF

43.7 KB Created: 2021-05-12 06:33:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 956431cf4a1c00955d07c3c561c046e9 SHA-1: 94845cd03ade7715df74e68b744e94bc965ce9de SHA-256: 6413bc96b74d537139e421f069920e0afa757ed650a93a78669f9cc5ce2dbd66
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to malicious infrastructure, specifically promoting 'free Robux' or game hacks. The primary lure URL is https://netcdn.xyz/app/431946152/free-robux-generator-without-verification-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a malicious redirector designed to trick users into visiting potentially harmful sites, likely as part of a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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 https://netcdn.xyz/app/431946152/free-robux-generator-without-verification-game-hack In PDF document text
    • http://pustaka.polbangtan-gowa.ac.id/repository/free-roblox-script-executor_GM431946152.pdfIn PDF document text
    • http://pustaka.polbangtan-gowa.ac.id//repository/how-to-get-roebucks_GM431946152.pdfIn PDF document text
    • http://pustaka.polbangtan-gowa.ac.id//repository/how-to-get-roblox-credit-for-free_GM431946152.pdfIn PDF document text
    • http://pustaka.polbangtan-gowa.ac.id//repository/free-robux-real-working_GM431946152.pdfIn PDF document text
    • http://pustaka.polbangtan-gowa.ac.id/repository/minecraft-java-edition-key-free_GM479516143.pdfIn PDF document text
    • http://pustaka.polbangtan-gowa.ac.id//repository/free-robux-app-real_GM431946152.pdfIn PDF document text
    • http://pustaka.polbangtan-gowa.ac.id/repository/hack-coin-master-online-without-human-verification_GM406889139.pdfIn PDF document text
    • http://pustaka.polbangtan-gowa.ac.id//repository/robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://pustaka.polbangtan-gowa.ac.id/repository/coin-master-400-spin-link-today_GM406889139.pdfIn PDF document text
    • http://pustaka.polbangtan-gowa.ac.id//repository/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.polbangtan-gowa.ac.id/repository/how-do-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://pustaka.polbangtan-gowa.ac.id/repository/free-robux-mobile_GM431946152.pdfIn PDF document text
    • http://pustaka.polbangtan-gowa.ac.id//repository/how-to-get-free-robux-as-a-kid_GM431946152.pdfIn PDF document text
    • http://pustaka.polbangtan-gowa.ac.id/repository/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.polbangtan-gowa.ac.id/repository/coin-master-spin-link-free-download_GM406889139.pdfIn PDF document text
    • http://pustaka.polbangtan-gowa.ac.id/repository/roblox-girl-avatar_GM431946152.pdfIn PDF document text
    • http://pustaka.polbangtan-gowa.ac.id//repository/hack-coin-master-8-ball-pool_GM406889139.pdfIn PDF document text
    • http://pustaka.polbangtan-gowa.ac.id//repository/jailbreak-script_GM431946152.pdfIn PDF document text
    • http://pustaka.polbangtan-gowa.ac.id//repository/robux-free-online_GM431946152.pdfIn PDF document text
    • http://pustaka.polbangtan-gowa.ac.id//repository/free-robux-hack-no-verification_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_off00004db6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4DB6 24736 bytes
SHA-256: 6dce3c3c4148783d412a301272c02ae9caa5b468c1823d72f4163c6ca955deb5
font_01_sfnt_off000086ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86AD 18964 bytes
SHA-256: 28b129fa50d9ed943d388e6dee4b9579dbddb2c3d46c54f90e146500d20faa97

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