Malicious PDF — malware analysis report

Static analysis result for SHA-256 84a2e69733b373cf…

MALICIOUS

PDF

45.3 KB Created: 2021-06-03 21:18:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 4325f86e753c4a62ebafd47538e3b700 SHA-1: f4dcf7782e7b23b0dfb00f417a6e14c722dbbefd SHA-256: 84a2e69733b373cfe0fb6c22e1ffeb1030e35c5659791b9b2532275362c47f95
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 0.9864

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/431946152/bloxpage-free-robux-game-hack PDF link annotation
    • http://library-fkip.uho.ac.id/repository/pokemon-go-free-quagsire_GM1094591345.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/robux-free-c_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/free-roblox-outfits-2021_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/roblox-hacks-for-mac_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/bloxpage-free-robux_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/coin-master-hack-apk-app_GM406889139.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/roblox-hacking-system-download_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/minecraft-for-macbook-free_GM479516143.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/free-spin-today-coin-master_GM406889139.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/free-tiktok-bots_GM835599320.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/free-robux-games_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/moonactive-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/coin-master-free-spins-and-free-coins_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_off00004fb0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FB0 27400 bytes
SHA-256: 19174e8e31fdea02211caaf54d66a03efbdc593dec6b98a3651405009cca01bf
font_01_sfnt_off00008d04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D04 18780 bytes
SHA-256: 8079f6869f23e56f7f88ee142026b01b7091fa2dbc4ae930d55ddd1363288b03

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