Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fc9128f48be01ac…

MALICIOUS

PDF

44.5 KB Created: 2021-06-04 01:41:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 9b05890648b11767c5f7e7455b8296ff SHA-1: 286fcb14fbbc75232b8a7127ea712e4e26b30b14 SHA-256: 3fc9128f48be01ace7c47ecdf1fd9a82c23af918586e9923af08cc1d92b3a0ed
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/real-coin-master-hack-2021-game-hack PDF link annotation
    • http://library.itekes-bali.ac.id/repository/coin-master-spins-hack_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/spin-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/earn-rbx_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/best-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/minecraft-free-edition_GM479516143.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/minecraft-realms-free-codes_GM479516143.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-free-spins-and-coins-daily-links_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-robux-com-no-verification_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/minecraft-free-download-pc_GM479516143.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-modded-minecraft-server_GM479516143.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/daily-coin-master-link_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-spin-coin-master-today_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coinmaster-spin-ml-link_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/robux-online_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-www-com_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/earn-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/robux-hack-2021_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_off000050b3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50B3 25812 bytes
SHA-256: b2f4057bae3093e6d979c6a906cc56e9794fe7d6eb6bccaf95530212a9fb321b
font_01_sfnt_off00008bb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BB4 18192 bytes
SHA-256: b4c41a46567064d4197865bd819757eb36d0b1d423a991f81f4246b2a9d75138

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