Malicious PDF — malware analysis report

Static analysis result for SHA-256 99cbe096d509d713…

MALICIOUS

PDF

45.2 KB Created: 2021-05-13 07:00:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 3bba53747db93e43398b297b80ca2ec6 SHA-1: f86131587f338b68d9b167172cf80a1791634e2a SHA-256: 99cbe096d509d7138a5124e38d0a71cff1a0361e928c7d889893a3edd0863e3a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, masquerading as free game hacks or generators. The primary redirector URL is https://netcdn.xyz/app/431946152/code-free-robux-game-hack, which is designed to lure users into clicking through to potentially harmful content. The document body and embedded URLs strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/code-free-robux-game-hack In PDF document text
    • https://europainstitut.hu/images/flame-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://europainstitut.hu/images/coin-master-mod-apk-unlimited-spin-download-free-full-version_GM406889139.pdfIn PDF document text
    • https://europainstitut.hu/images/roblox-adopt-me-hacks-2021_GM431946152.pdfIn PDF document text
    • https://europainstitut.hu/images/how-to-play-minecraft-for-free-on-computer_GM479516143.pdfIn PDF document text
    • https://europainstitut.hu/images/how-to-hack-people-in-roblox_GM431946152.pdfIn PDF document text
    • https://europainstitut.hu/images/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://europainstitut.hu/images/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://europainstitut.hu/images/rbx-hut-promo-codes_GM431946152.pdfIn PDF document text
    • https://europainstitut.hu/images/op-rewards-free-robux_GM431946152.pdfIn PDF document text
    • https://europainstitut.hu/images/coin-master-free-spin-sites_GM406889139.pdfIn PDF document text
    • https://europainstitut.hu/images/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://europainstitut.hu/images/hack-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • https://europainstitut.hu/images/minecraft-java-code-free_GM479516143.pdfIn PDF document text
    • https://europainstitut.hu/images/free-roblox-intros_GM431946152.pdfIn PDF document text
    • https://europainstitut.hu/images/free-robux-com-2021_GM431946152.pdfIn PDF document text
    • https://europainstitut.hu/images/minecraft-world-free-download_GM479516143.pdfIn PDF document text
    • https://europainstitut.hu/images/roblox-hack-app_GM431946152.pdfIn PDF document text
    • https://europainstitut.hu/images/free-robux-group_GM431946152.pdfIn PDF document text
    • https://europainstitut.hu/images/coin-master-gift-link-hack_GM406889139.pdfIn PDF document text
    • https://europainstitut.hu/images/coin-master-3533-android-hack_GM406889139.pdfIn PDF document text
    • https://www.nrzroblox.comIn 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
stream_003_off00004891.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4891 31784 bytes
SHA-256: fb0886c7f08e17b6b3d44450c521ed7de247261c0702ae77a0d0a8df415ca171
font_01_sfnt_off00008ef8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EF8 18188 bytes
SHA-256: 00280273b0975bee0187bf1a1cc0e29ac13cf800f2976c84d5f4ba53341fee41

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