Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3c24a58f395d948…

MALICIOUS

PDF

48.5 KB Created: 2021-05-12 19:31:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 180b5a5b04417e59c34494e6325d9c8c SHA-1: 7a6e2e18ed62268647193a4cecedf5cbe78881a6 SHA-256: c3c24a58f395d9487afdd169f4877db36282550bbacfcf7f01337c53be4ac65d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to malicious redirectors, specifically advertising 'free Robux' or 'game hacks' to lure victims. The primary redirector URL is https://netcdn.xyz/app/431946152/easy-robux-hack-game-hack, which is associated with a known malicious infrastructure. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or scam campaign, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

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/easy-robux-hack-game-hack In PDF document text
    • https://megapolgroup.com/ckeditor/ckfinder/userfiles/files/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • https://megapolgroup.com/ckeditor/ckfinder/userfiles/files/coin-master-free-cards-2021_GM406889139.pdfIn PDF document text
    • https://megapolgroup.com/ckeditor/ckfinder/userfiles/files/free-robux-reddit_GM431946152.pdfIn PDF document text
    • https://megapolgroup.com/ckeditor/ckfinder/userfiles/files/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://megapolgroup.com/ckeditor/ckfinder/userfiles/files/free-robux-microsoft_GM431946152.pdfIn PDF document text
    • https://megapolgroup.com/ckeditor/ckfinder/userfiles/files/best-tricks-co-robux_GM431946152.pdfIn PDF document text
    • https://megapolgroup.com/ckeditor/ckfinder/userfiles/files/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
    • https://megapolgroup.com/ckeditor/ckfinder/userfiles/files/100-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://megapolgroup.com/ckeditor/ckfinder/userfiles/files/free-spins-coin-master-app-ios_GM406889139.pdfIn PDF document text
    • https://megapolgroup.com/ckeditor/ckfinder/userfiles/files/free-robux-with-no-survey_GM431946152.pdfIn PDF document text
    • https://megapolgroup.com/ckeditor/ckfinder/userfiles/files/coin-master-tricks-and-hacks_GM406889139.pdfIn PDF document text
    • https://megapolgroup.com/ckeditor/ckfinder/userfiles/files/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • https://megapolgroup.com/ckeditor/ckfinder/userfiles/files/free-robux-just-click_GM431946152.pdfIn PDF document text
    • https://megapolgroup.com/ckeditor/ckfinder/userfiles/files/easy-robux-com_GM431946152.pdfIn PDF document text
    • https://megapolgroup.com/ckeditor/ckfinder/userfiles/files/easy-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://megapolgroup.com/ckeditor/ckfinder/userfiles/files/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • https://megapolgroup.com/ckeditor/ckfinder/userfiles/files/free-printable-roblox-images_GM431946152.pdfIn PDF document text
    • https://megapolgroup.com/ckeditor/ckfinder/userfiles/files/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • https://megapolgroup.com/ckeditor/ckfinder/userfiles/files/roblox-hack-download_GM431946152.pdfIn PDF document text
    • https://megapolgroup.com/ckeditor/ckfinder/userfiles/files/coin-master-free-spins-link-ios_GM406889139.pdfIn PDF document text
    • https://collectrobuxIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004bae.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BAE 28204 bytes
SHA-256: b647454abac57d78c9d7fbe03d979324b695800166413e605d2d89d1ca668119
font_01_sfnt_off00008dd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DD5 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off00009a7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A7C 18428 bytes
SHA-256: 2bceebe5c1993dbcd4316f947943b347169ed843d74f7d3766fe916d90107923

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