Malicious PDF — malware analysis report

Static analysis result for SHA-256 533a5d4b925e4830…

MALICIOUS

PDF

36.0 KB Created: 2021-07-05 15:10:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 3f01ae5ff6d6ec02832269d4f807a0ef SHA-1: fc6cb066ec42e9c4ec83f3d53b9a05c07c604edd SHA-256: 533a5d4b925e4830e2d83e29ef5a8875e604af0413950a345f2820331003ec6f
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 0.9980

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 http://netcdn.tw/app/431946152/free-robux-websites-that-actually-work-2021-game-hack PDF link annotation
    • http://perpus.stihpada.ac.id/repository/free-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.stihpada.ac.id/repository/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://perpus.stihpada.ac.id/repository/roblox-hack-hackerbot_GM431946152.pdfIn PDF document text
    • http://perpus.stihpada.ac.id/repository/real-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://perpus.stihpada.ac.id/repository/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://perpus.stihpada.ac.id/repository/robux-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.stihpada.ac.id/repository/robux-hack-tools_GM431946152.pdfIn PDF document text
    • http://perpus.stihpada.ac.id/repository/roblox-hack-tool_GM431946152.pdfIn PDF document text
    • http://perpus.stihpada.ac.id/repository/claimrbx-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.stihpada.ac.id/repository/coin-master-daily-gifts_GM406889139.pdfIn PDF document text
    • http://perpus.stihpada.ac.id/repository/roblox-moderators_GM431946152.pdfIn PDF document text
    • http://perpus.stihpada.ac.id/repository/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://perpus.stihpada.ac.id/repository/how-to-download-minecraft-for-free-on-windows_GM479516143.pdfIn PDF document text
    • http://perpus.stihpada.ac.id/repository/moonactive-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://perpus.stihpada.ac.id/repository/free-robux-no-verification-required_GM431946152.pdfIn PDF document text
    • http://perpus.stihpada.ac.id/repository/roblox-free-hair-boy_GM431946152.pdfIn PDF document text
    • http://perpus.stihpada.ac.id/repository/free-robux-obby-actually-works_GM431946152.pdfIn PDF document text
    • http://perpus.stihpada.ac.id/repository/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://perpus.stihpada.ac.id/repository/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://perpus.stihpada.ac.id/repository/free-robux-generator-no-survey_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_002_off00002fb2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2FB2 23304 bytes
SHA-256: 2dd345063e15bd6dc76db2db1d9977f713344a2cff3a28b981e499795b972639
font_01_sfnt_off0000645c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x645C 20132 bytes
SHA-256: 9d543b218f76da85b115eec436649c45a36d61030086af4e0a98f96e7e9ce1eb

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