Malicious PDF — malware analysis report

Static analysis result for SHA-256 a50c0776690eaa50…

MALICIOUS

PDF

43.1 KB Created: 2021-06-03 09:14:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e42fee4356facf73dcd0b199cb8dabfa SHA-1: d5387ed4e969cb01e59a9881fc9e308399b48d83 SHA-256: a50c0776690eaa506b4925d6b639163b6ff26e5f331e46ea1bc4eed825c9b728
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to malicious infrastructure, specifically promoting game hacks and free spins. The document body and heuristics indicate a lure for users to click these links, likely leading to further malware or phishing. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9874

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/coin-master-rewards-free-spins-game-hack In PDF document text
    • http://lib.fisipumt.ac.id/repository/free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-how-to-get-free-clothes_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-golden-card-hack_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-minecraft-skin-packs_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-get-robux-fast_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/real-working-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-spins-gratis_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/microsoft-bing-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/pokemon-go-free-pokeballs-code_GM1094591345.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-apk_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/free-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/working-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/script-executor-roblox-free_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-hack-root_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/minecraft-bedrock-hacks_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-get-minecraft-for-free-on-xbox-360_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/minecraft-windows-10-hack-client-2021_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-robux-generator-tool_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-fan_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-roblox-templates_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_off00004ef2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4EF2 24100 bytes
SHA-256: f088dabf8ae03138638ee7fcae35daa34975ae9c412ad29ccc0685ed878fd97b
font_01_sfnt_off000085d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85D4 18224 bytes
SHA-256: e3bc9749dc9baa5e723214be821330cae5b6b7c9985655e349a80ec6d91cde9f