Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d81a7f7e0d8a069…

MALICIOUS

PDF

34.7 KB Created: 2021-07-04 19:00:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: cdad5a31e53ac7b68b2d16963c35b0f9 SHA-1: d63e5ace4129c449ee0caaa63f387f6ef6eadb1e SHA-256: 0d81a7f7e0d8a069154557497edfe194e06dc9f280774dd3b6c8a82164594fee
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/show-me-how-to-get-free-robux-game-hack PDF link annotation
    • http://biblioteca.ganexa.edu.pa/repository/roblox-free-hair-codes_GM431946152.pdfIn PDF document text
    • http://biblioteca.ganexa.edu.pa/repository/free-robux-groups-2021_GM431946152.pdfIn PDF document text
    • http://biblioteca.ganexa.edu.pa/repository/roblox-epic-minigames-speed-hack-download-free-2021_GM431946152.pdfIn PDF document text
    • http://biblioteca.ganexa.edu.pa/repository/coin-master-bonus_GM406889139.pdfIn PDF document text
    • http://biblioteca.ganexa.edu.pa/repository/free-robux-discord-servers_GM431946152.pdfIn PDF document text
    • http://biblioteca.ganexa.edu.pa/repository/need-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://biblioteca.ganexa.edu.pa/repository/how-to-get-free-stuff-on-roblox-hack_GM431946152.pdfIn PDF document text
    • http://biblioteca.ganexa.edu.pa/repository/coin-master-hack-unlimited-spins-game-download_GM406889139.pdfIn PDF document text
    • http://biblioteca.ganexa.edu.pa/repository/coin-master-daily-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • http://biblioteca.ganexa.edu.pa/repository/how-to-get-free-unlimited-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://biblioteca.ganexa.edu.pa/repository/how-to-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://biblioteca.ganexa.edu.pa/repository/fast-robux-online_GM431946152.pdfIn PDF document text
    • http://biblioteca.ganexa.edu.pa/repository/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://biblioteca.ganexa.edu.pa/repository/krnl-roblox_GM431946152.pdfIn PDF document text
    • http://biblioteca.ganexa.edu.pa/repository/free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://biblioteca.ganexa.edu.pa/repository/roblox-cheat-engine-62-download_GM431946152.pdfIn PDF document text
    • http://biblioteca.ganexa.edu.pa/repository/roblox-verification_GM431946152.pdfIn PDF document text
    • http://biblioteca.ganexa.edu.pa/repository/free-robux-websites-that-work_GM431946152.pdfIn PDF document text
    • http://biblioteca.ganexa.edu.pa/repository/free-minecraft-for-kids_GM479516143.pdfIn PDF document text
    • http://biblioteca.ganexa.edu.pa/repository/robux-withdraw_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_off00002e6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E6B 23288 bytes
SHA-256: 6c7f3c4c2e7820d918db2eeb475ddcb88cbb1c2068049649b850ae0dbfbbd4d2
font_01_sfnt_off000061f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61F3 19348 bytes
SHA-256: d26d04a97ef4ef1984db51a9dbb6ae7fe4887511724be7c0a10401d3a20c9a41

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