Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b7a16640a2096ad…

MALICIOUS

PDF

43.0 KB Created: 2021-05-10 16:04:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b6ef0d74407b0d6d2e800849f614cd70 SHA-1: c8f210dc6553ec7c99e006d6e33faf6d8707174f SHA-256: 3b7a16640a2096ad6e93c7232c796eea62210d02dbf92d26b756709baafffa11
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains lures for free game items and redirects users to malicious infrastructure, specifically the URL 'https://netcdn.xyz/app/479516143/free-minecraft-thumbnails-game-hack'. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to lead users to potentially harmful content or further exploits. Although no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a phishing or redirection attack.

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/479516143/free-minecraft-thumbnails-game-hack In PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/coin-master-free-spins-no-verification_GM406889139.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/how-to-get-free-robux-easy-on-phone_GM431946152.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/free-robux-not-fake_GM431946152.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/robux-hack_GM431946152.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/rblx-city-free-robux_GM431946152.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/free-robux-no-gift-card_GM431946152.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/free-minecraft-skins-java_GM479516143.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/coin-master-34-4-free-download_GM406889139.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/coin-master-free-daily-rewards_GM406889139.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/i-want-robux_GM431946152.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/coin-master-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/roblox-avatar-free_GM431946152.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/free-spins-coin-master-2021-hack_GM406889139.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/how-to-get-more-spins-on-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/free-coins-for-planet-master-game_GM406889139.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/coin-master-15-free-spin-link-today_GM406889139.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/mine-minecraft-games-for-free_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_off00004e36.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E36 24396 bytes
SHA-256: 1d62dbf1f70324a4f541c209389378bd424f8dab025d09b6710514b73947932e
font_01_sfnt_off00008613.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8613 18368 bytes
SHA-256: 85a02e6fcaecceb391bd1a2e9ef36225352b9e1f533fa420e6bae34b60a7da86

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