Malicious PDF — malware analysis report

Static analysis result for SHA-256 55c31652053ea707…

MALICIOUS

PDF

45.9 KB Created: 2021-05-19 11:12:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f36ac604a009fd851c06ed0170c706de SHA-1: e317dd9f60e6dd7c32bd62fd171c874179d4e8d7 SHA-256: 55c31652053ea707ff9ac40d1e50595245b036f73a5fd4f49829c9ecfedf3e27
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, specifically promoting 'free generator' or 'game hack' lures. The primary malicious URL identified is https://netcdn.xyz/app/406889139/free-spins-on-coin-master-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly indicate a phishing or scam attempt designed to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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-spins-on-coin-master-game-hack In PDF document text
    • http://bi-bordtennis.dk/images/haktuts-coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://bi-bordtennis.dk/images/free-spin-coin-master-app-download_GM406889139.pdfIn PDF document text
    • http://bi-bordtennis.dk/images/how-to-get-minecraft-for-free-on-xbox-360_GM479516143.pdfIn PDF document text
    • http://bi-bordtennis.dk/images/coin-master-card-hack_GM406889139.pdfIn PDF document text
    • http://bi-bordtennis.dk/images/coin-spin-link_GM406889139.pdfIn PDF document text
    • http://bi-bordtennis.dk/images/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://bi-bordtennis.dk/images/oprewards-login_GM431946152.pdfIn PDF document text
    • http://bi-bordtennis.dk/images/minecraft-education-free_GM479516143.pdfIn PDF document text
    • http://bi-bordtennis.dk/images/free-robux-working_GM431946152.pdfIn PDF document text
    • http://bi-bordtennis.dk/images/hacks-for-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://bi-bordtennis.dk/images/free-robux-now_GM431946152.pdfIn PDF document text
    • http://bi-bordtennis.dk/images/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://bi-bordtennis.dk/images/coin-master-hack-app-ios-download_GM406889139.pdfIn PDF document text
    • http://bi-bordtennis.dk/images/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://bi-bordtennis.dk/images/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://bi-bordtennis.dk/images/minecraft-ios-mods_GM479516143.pdfIn PDF document text
    • http://bi-bordtennis.dk/images/how-to-change-roblox-username-for-free_GM431946152.pdfIn PDF document text
    • http://bi-bordtennis.dk/images/best-hacked-client_GM479516143.pdfIn PDF document text
    • http://bi-bordtennis.dk/images/how-to-get-free-admin-in-roblox_GM431946152.pdfIn PDF document text
    • http://bi-bordtennis.dk/images/how-to-hack-coin-master-game-2021_GM406889139.pdfIn 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_off00004a85.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A85 25656 bytes
SHA-256: 3894580253474dcc578d0d4fc41510f746e1f1279a0bff5bfbcaa70f3d7949db
font_01_sfnt_off000084a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84A0 4020 bytes
SHA-256: dbaa9c12d07f3632734605f1d5d6dee3ad5af1f57488e46d95dab68b383f08c5
font_02_sfnt_off00009227.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9227 17884 bytes
SHA-256: addbd5428a422ca7211e94293fed3a4f98c85d5f6337328d4d3623e90d90c649

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