Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4a668b65d0538a6…

MALICIOUS

PDF

48.5 KB Created: 2021-06-04 02:52:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 80031e53c3c98a2ec70b52ebf62d5763 SHA-1: 1b80640cea1e35d985f7e92860e688d908eaef67 SHA-256: e4a668b65d0538a62a65c6f3bbbbd02fbbe8a9f6a836982241670e946dc1829e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains embedded URLs and a visual call-to-action button, strongly suggesting a phishing or social engineering attempt. The ML classifier also flagged the PDF as malicious. The primary URL, https://netcdn.online/app/431946152/free-roblox-clothes-girl-game-hack, likely hosts a malicious payload disguised as a game hack or cheat.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.online/app/431946152/free-roblox-clothes-girl-game-hack In PDF document text
    • http://library.futureuniversity.com/repository/free-spin-and-daily-news-coin-master_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/60-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-hack-tuts_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-spins-coin-master-apple_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-robux-no-human-verification-and-no-survey_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-free-coins-and-spins-online-tool_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/roblox-com-hack_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-free-bonus_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/robux-hack-tools_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/google-roblox-games_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/good-free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/roblox-army-robux_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-hack-spins-free_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/minecraft-free-ios_GM479516143.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/how-do-you-hack-for-2021000-coins-on-flip-master_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-roblox-cards-pin-number_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/boku-no-roblox-working-hack-script_GM431946152.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_004_off000053f5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53F5 25104 bytes
SHA-256: d5dd6d4daffb26f919886b0387c8b235761807dcf38036dcf3c09ee66e0c507e
font_01_sfnt_off00008d87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D87 3992 bytes
SHA-256: ffe81d6ff9cf4cba2f44018ff3b4705430ef842e0eebe7a2ee632b97b2425086
font_02_sfnt_off00009ab2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9AB2 18340 bytes
SHA-256: d29ec2e71bb068e77f351b4d123c990b41e31d257b9d9cf8b177703eed95a4a4

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