Malicious PDF — malware analysis report

Static analysis result for SHA-256 64a75f04d1071cef…

MALICIOUS

PDF

34.4 KB Created: 2021-07-06 20:14:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: a413db3f9ba742d4a296bd9df36528b5 SHA-1: 99ed438280ef4eb56fe450105e9d5dc5cecb8759 SHA-256: 64a75f04d1071cefac5216ac617219c0d2b407ed794aecdf86144bc06cfde6f1
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/406889139/how-to-o-get-free-coin-master-spins-game-hack PDF link annotation
    • http://vetmed.fkh.unair.ac.id/repository/robux-hack-me_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/get-free-money-on-adopt-ke-roblox_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/free-spins-coin-master-haktuts_GM406889139.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/robux-gratis-hack-descargar_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/coin-master-15-free-spin-link-today_GM406889139.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/tuto-free-animation-2021-roblox_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/roblox-fidget-spinner-free-games_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/free-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/money-hack-in-roblox-retail-tycoon_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/free-robux-developer-tools_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/free-attacks-coin-master_GM406889139.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/get-robux-com_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/roblox-free-groups-with-funds_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/hacking-into-games-vip-rooms-roblox_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/free-robux-noe_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/free-robux-1-million_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
font_00_sfnt_off00003175.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3175 22488 bytes
SHA-256: 171955b4c719bb2926c57b6374c24b6186a0c7b1a3b3b1648550ea336af8f3ac
font_01_sfnt_off0000638e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x638E 18336 bytes
SHA-256: 88fb275224d01e2fb2ba19e8488dcc02f674101147b00fcd4e979f6cbde2f727

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