Malicious PDF — malware analysis report

Static analysis result for SHA-256 c52d4ab8a84df72a…

MALICIOUS

PDF

42.5 KB Created: 2021-05-17 04:34:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f134a13396040ae0774ad58ab763821f SHA-1: e61c1d6af14f087a2fc7238a854d8aea7507ba83 SHA-256: c52d4ab8a84df72a80f096df425ff56f0796e3174c2cadda56b7a3fe266265bd
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically advertising 'free generators' and 'game hacks' for popular games. The document body, though heavily obfuscated, contains references to these lures and directs users to URLs such as https://netcdn.xyz/app/431946152/robux-game-com-game-hack. This indicates a phishing or scam attempt designed to lead users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/robux-game-com-game-hack In PDF document text
    • http://nod74.ru/images/flip-master-free-coins_GM406889139.pdfIn PDF document text
    • http://nod74.ru/images/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • http://nod74.ru/images/minecraft-116-apk-download_GM479516143.pdfIn PDF document text
    • http://nod74.ru/images/latest-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://nod74.ru/images/robux-no-survey_GM431946152.pdfIn PDF document text
    • http://nod74.ru/images/free-minecraft-education-edition_GM479516143.pdfIn PDF document text
    • http://nod74.ru/images/coin-master-app-for-free-spins_GM406889139.pdfIn PDF document text
    • http://nod74.ru/images/coin-master-100-spin-slot_GM406889139.pdfIn PDF document text
    • http://nod74.ru/images/legit-coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://nod74.ru/images/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://nod74.ru/images/minecraft-pe-free-download-android_GM479516143.pdfIn PDF document text
    • http://nod74.ru/images/minecraft-coins-free_GM479516143.pdfIn PDF document text
    • http://nod74.ru/images/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • http://nod74.ru/images/how-to-hack-mcpe-master-coins_GM406889139.pdfIn PDF document text
    • http://nod74.ru/images/how-to-download-minecraft-for-free-on-windows_GM479516143.pdfIn PDF document text
    • http://nod74.ru/images/free-robux-today_GM431946152.pdfIn PDF document text
    • http://nod74.ru/images/games-on-roblox-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://nod74.ru/images/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://nod74.ru/images/free-pet-food-for-coin-master_GM406889139.pdfIn PDF document text
    • http://nod74.ru/images/minecraft-free-download-iphone_GM479516143.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_off000048a0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48A0 26424 bytes
SHA-256: 03d599c3c74340ab16e69d054665daf659a1511d2f18e55592a29376de7a78e6
font_01_sfnt_off000083b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83B5 18340 bytes
SHA-256: c3384937c05d12942e5ee2f32f048a43efe3336dc3e7ac7a8d2adf4ff389f548

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