Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba10fe9a756687cc…

MALICIOUS

PDF

44.4 KB Created: 2021-06-03 07:37:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 53189a0e9b178be79faf0dbb22472985 SHA-1: 7e81ab5e3de18b36ba077d3e1ef786113bde00dc SHA-256: ba10fe9a756687cc6f6930f6b19c878d1476017c4c8f85d0c3b6d2a7a7b4bc36
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to a known malicious redirector infrastructure, specifically advertising a "Coin Master Hack App Download Free". The ML classifier also flagged this PDF with high confidence. The document body, though heavily obfuscated, contains references to the same malicious URL, suggesting the primary goal is to trick users into downloading potentially unwanted or malicious software. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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-hack-app-download-free-game-hack In PDF document text
    • http://library.ft.upnvj.ac.id/repository/robuxmatchcon_GM431946152.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/robux_GM431946152.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/coin-master-free-spins-link-app-download_GM406889139.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/free-robux-discord-servers_GM431946152.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/free-robux-no-verification-required_GM431946152.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/free-robux-download_GM431946152.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/blogspot-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/free-robux-no-apps_GM431946152.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/how-to-make-a-free-server-in-minecraft-java_GM479516143.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/free-coins-and-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/how-to-get-hacks-on-minecraft_GM479516143.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/how-to-get-roblox-premium-for-free-2021_GM431946152.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/spin-coin_GM406889139.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/como-descargar-coin-master-hackeado_GM406889139.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/free-robux-wheel_GM431946152.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/free-spin-generator-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/coin-master-bonus_GM406889139.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/coin-master-connection-lost-hack_GM406889139.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_off00004e30.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E30 25932 bytes
SHA-256: 63912a83a201c97b78c18e690f868b376fd9f2cf6d146c05791e3c8bb6f08033
font_01_sfnt_off00008a23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A23 18636 bytes
SHA-256: fa7a6da1b4bcc113a0958a5ae0d8c2ab7d580afb69fd53804aad306f80425e53

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