Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b07957a36b24a91…

MALICIOUS

PDF

28.4 KB Created: 2021-05-10 19:38:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e8a31e195d6e2bc0c6785737e2b58fc1 SHA-1: 4e58146a287d8fa75ba0c627bb2b721745468c45 SHA-256: 4b07957a36b24a91bf6e6aaa943935b1fd5b42a1bbf2225502b968c8098fcaee
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generator / game hack' lures. The primary URL identified is https://netcdn.xyz/app/431946152/how-to-get-free-robux-without-doing-anything-game-hack. This indicates a social engineering tactic to trick users into visiting potentially harmful sites. No scripts were extracted, but the presence of malicious redirector links and the lure content strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9789

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/how-to-get-free-robux-without-doing-anything-game-hack In PDF document text
    • http://riccardodurso.it/images/free-robux-no-apps_GM431946152.pdfIn PDF document text
    • http://riccardodurso.it/images/is-coin-master-hacks-safe_GM406889139.pdfIn PDF document text
    • http://riccardodurso.it/images/coin-master-free-spins-and-coins-for-today_GM406889139.pdfIn PDF document text
    • http://riccardodurso.it/images/free-unlimited-coin-master-400-spin-link_GM406889139.pdfIn PDF document text
    • http://riccardodurso.it/images/coin-master-free-spin-daily-link_GM406889139.pdfIn PDF document text
    • http://riccardodurso.it/images/coin-master-free-spin-and-trading_GM406889139.pdfIn PDF document text
    • http://riccardodurso.it/images/free-free-robux_GM431946152.pdfIn PDF document text
    • http://riccardodurso.it/images/coin-master-hack-quora_GM406889139.pdfIn PDF document text
    • http://riccardodurso.it/images/coin-master-free-fire_GM406889139.pdfIn PDF document text
    • http://riccardodurso.it/images/robux-gainer_GM431946152.pdfIn PDF document text
    • http://riccardodurso.it/images/free-spins-and-coins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://riccardodurso.it/images/free-robux-stream_GM431946152.pdfIn PDF document text
    • http://riccardodurso.it/images/hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://riccardodurso.it/images/coin-master-hack-apk-download-for-android_GM406889139.pdfIn PDF document text
    • http://riccardodurso.it/images/free-spins-and-coins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://riccardodurso.it/images/free-roblox-accounts-dantdm_GM431946152.pdfIn PDF document text
    • http://riccardodurso.it/images/free-roblox-gift-card-codes-2021-unused_GM431946152.pdfIn PDF document text
    • http://riccardodurso.it/images/how-to-get-free-skins-in-roblox_GM431946152.pdfIn PDF document text
    • http://riccardodurso.it/images/how-do-you-get-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000204b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x204B 19428 bytes
SHA-256: 1407f88229a207ba82d019c6750a1fd57e36c24bdd48565a90fc09ee6de9f9c2
font_01_sfnt_off000048f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48F2 19400 bytes
SHA-256: 843e7c6de0628ecb74dfde19cdfb212261a67f0d6d996bc16e2547f6c0bce3d3

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