Malicious PDF — malware analysis report

Static analysis result for SHA-256 18dddfe5bfd53c06…

MALICIOUS

PDF

35.6 KB Created: 2021-07-04 00:47:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: e81baba0e194c80b9de4dc143418e03d SHA-1: caf3cb7d86613f1d8e4a0a3ea6b0bca7c75efe4c SHA-256: 18dddfe5bfd53c06265b87d8bd273e22a988ed640ef0c5fc40eb697391ce86de
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/coin-master-hack-xyz-download-free-game-hack PDF link annotation
    • http://gts.edu.gh/library/repository/free-roblox-rescources-no-download-or-verification_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/can-you-hack-roblox_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/roblox-character-free_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-coins-on-coin-master-generator_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/roblox-cheat-codes-for-ipad_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/roblox-kick-hack_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-robux-images_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/how-to-get-free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-coins-for-flip-master-online_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/hack-coin-master-link_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/roblox-reddit-hacks_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/roblox-ios-android-pc-hack_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/how-to-hack-and-become-higher-rank-roblox-d-day_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/coin-master-spin-hack-pc_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/how-to-get-free-robux-hack-inspect-element_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/download-minecraft-free-hiapphere_GM479516143.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/coin-master-33-hack-version-download_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/coin-master-daily-free-coins-link_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_002_off000030b5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30B5 23352 bytes
SHA-256: e127e20bd0401b99e58bfca9f44678fa963bf418dc8295587e7760cfabd5c01c
font_01_sfnt_off00006587.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6587 19236 bytes
SHA-256: 40a95bac7efeedd056b1a9645696afbc74576a07b4b2fccba56c2b98aaafc7f4

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