Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6e4ea8459ea0dc7…

MALICIOUS

PDF

46.6 KB Created: 2021-06-03 06:39:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 8e6a9997a41b8188527651c4a6acd878 SHA-1: 609e4270e93ede2e7f9052a497837a1e5a3725cd SHA-256: b6e4ea8459ea0dc754a364beec610791727ce4e73a4dadc6d568affdfddd814c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a game hack redirect lure, pointing to a known malicious infrastructure. The document body, though heavily obfuscated, contains a URL that aligns with the heuristic findings. The presence of embedded URLs and the ML classifier's high confidence further support the malicious nature of this document, likely intended to trick users into visiting a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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/406889139/hack-master-coin-pc-game-hack In PDF document text
    • http://lib.mbp.ac.id/repository/how-to-get-minecraft-for-free-on-chromebook_GM479516143.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/minecraft-free-download-ipad_GM479516143.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/cm-spin-link_GM406889139.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/rbx-roblox-robux_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/roblox-avatar-editor-free_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/roblox-treasure-hunt-simulator-cheats_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/how-to-get-robux_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/coin-master-tiradas-gratis-2021_GM406889139.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/free-spins-and-coins-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/free-100-robux_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/free-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/minecraft-client-download_GM479516143.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/blogspot-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/login-robux_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/coin-master-free-spins-link-2021-hack_GM406889139.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/free-robux-accounts_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/get-free-robux-now_GM431946152.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_004_off00005224.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5224 30396 bytes
SHA-256: 0fafaa2bc36e2b39c61102376419ab1688f99327ccb69581fe1129937cd512e9
font_01_sfnt_off000094f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94F5 17868 bytes
SHA-256: 22b442a55f4ac2138d92a5558ea0ba8cd172fa39c5ed9e426124379d05989e3d

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