Malicious PDF — malware analysis report

Static analysis result for SHA-256 54d917ecb6c2dfb3…

MALICIOUS

PDF

43.6 KB Created: 2021-05-15 06:22:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 7231c7afd8885b02b5f048b443d81ed9 SHA-1: 2d3bac4bc00f1ab3b557f5cac8e356ed82cac6b3 SHA-256: 54d917ecb6c2dfb3a8796737b1e0bf53e7d2ff9967788523cd541ff0282ddfb0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains multiple heuristics indicating malicious redirector links, specifically luring users with 'free generator / game hack' content. The primary malicious URL identified is https://netcdn.xyz/app/406889139/free-coin-master-hacks-no-verification-or-survey-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or social engineering attack aimed at redirecting users to potentially harmful sites.

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/406889139/free-coin-master-hacks-no-verification-or-survey-game-hack In PDF document text
    • https://rivnepost.rv.ua/ckfinder/userfiles/files/hacks-para-roblox_GM431946152.pdfIn PDF document text
    • https://rivnepost.rv.ua/ckfinder/userfiles/files/how-to-get-free-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • https://rivnepost.rv.ua/ckfinder/userfiles/files/robux-free-co_GM431946152.pdfIn PDF document text
    • https://rivnepost.rv.ua/ckfinder/userfiles/files/coin-master-hacks-android_GM406889139.pdfIn PDF document text
    • https://rivnepost.rv.ua/ckfinder/userfiles/files/coin-master-game-download-free_GM406889139.pdfIn PDF document text
    • https://rivnepost.rv.ua/ckfinder/userfiles/files/minecraft-marketplace-free_GM479516143.pdfIn PDF document text
    • https://rivnepost.rv.ua/ckfinder/userfiles/files/robux-redeem_GM431946152.pdfIn PDF document text
    • https://rivnepost.rv.ua/ckfinder/userfiles/files/coin-master-free-spins-2021-hack_GM406889139.pdfIn PDF document text
    • https://rivnepost.rv.ua/ckfinder/userfiles/files/robux-websites-2021_GM431946152.pdfIn PDF document text
    • https://rivnepost.rv.ua/ckfinder/userfiles/files/roblox-com-hack_GM431946152.pdfIn PDF document text
    • https://rivnepost.rv.ua/ckfinder/userfiles/files/coin-master-hack-2021-ios_GM406889139.pdfIn PDF document text
    • https://rivnepost.rv.ua/ckfinder/userfiles/files/free-robux-images_GM431946152.pdfIn PDF document text
    • https://rivnepost.rv.ua/ckfinder/userfiles/files/roblox-redeem-codes-free_GM431946152.pdfIn PDF document text
    • https://rivnepost.rv.ua/ckfinder/userfiles/files/coin-master-free-cards-hack_GM406889139.pdfIn PDF document text
    • https://rivnepost.rv.ua/ckfinder/userfiles/files/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • https://rivnepost.rv.ua/ckfinder/userfiles/files/hack-coin-master-mod-apk_GM406889139.pdfIn PDF document text
    • https://rivnepost.rv.ua/ckfinder/userfiles/files/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • https://rivnepost.rv.ua/ckfinder/userfiles/files/free-spins-coin-master-unlimited_GM406889139.pdfIn PDF document text
    • https://rivnepost.rv.ua/ckfinder/userfiles/files/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • https://rivnepost.rv.ua/ckfinder/userfiles/files/roblox-hack-generator_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
stream_003_off00004bf5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BF5 26172 bytes
SHA-256: 0fb31888cfed4e7b88bd96625b5e02071f99285c3b594a401f28049604d60d44
font_01_sfnt_off000087b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87B0 18448 bytes
SHA-256: 6033c807022dc8f5e7c2550342d577dba769a4341b0264654ce29c91acd4bdf4

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