Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f0d8481054f77a8…

MALICIOUS

PDF

48.5 KB Created: 2021-06-04 03:16:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 3659099f227729134d2a70411c1ce374 SHA-1: 103dd998d0a8f0853c0c2a8d3319aec0f4d40172 SHA-256: 4f0d8481054f77a82c7f9a27785946541482ce37dd32014d00970ae3d6ccfa2b
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 0.9871

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/easy-way-to-get-robux-game-hack PDF link annotation
    • http://pustaka.faterna.unand.ac.id/repository/blogspot-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/coin-master-free-link_GM406889139.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/spin-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/wurst-download_GM479516143.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/hack-coin-master-site-rssingcom_GM406889139.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/is-tiktok-free_GM835599320.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/is-minecraft-free-on-xbox_GM479516143.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/can-i-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/console-roblox-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/coin-master-100-spin_GM406889139.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/how-to-get-free-robux-easy-no-download_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/roblox-hack-911_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/how-to-get-free-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/free-robux-cheats-no-survey_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/daily-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/robux-free-c_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/robux-free-online_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_off00005b54.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5B54 27024 bytes
SHA-256: bf7c37bd5942b2a24daaf6497d92e19a8fb65436cab5d77a2903a52438d2432a
font_01_sfnt_off00009a1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A1F 18560 bytes
SHA-256: 16d2f5dc94ecc1bd1976284b8eef7d233b4bcb1619574e97c1ce934a804ad058

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