Malicious PDF — malware analysis report

Static analysis result for SHA-256 65ba8bc2d3ce6560…

MALICIOUS

PDF

35.5 KB Created: 2021-07-03 11:57:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 42a08eb0c97f027fe8ac09a47413022d SHA-1: d36fc477d36aaf40d47355054a9d1442627fc386 SHA-256: 65ba8bc2d3ce656083961051c72c4c61fe3106b62391cc7350e200aa7b5fd75c
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-get-free-spins-for-coin-master-game-hack PDF link annotation
    • http://ginfed.net.co/editor_rc/tools/ckeditor/img/images/files/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://ginfed.net.co/editor_rc/tools/ckeditor/img/images/files/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://ginfed.net.co/editor_rc/tools/ckeditor/img/images/files/coin-master-daily-free-coins-link-today_GM406889139.pdfIn PDF document text
    • http://ginfed.net.co/editor_rc/tools/ckeditor/img/images/files/hack-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • http://ginfed.net.co/editor_rc/tools/ckeditor/img/images/files/how-to-get-free-robux-in-roblox-on-the-pc_GM431946152.pdfIn PDF document text
    • http://ginfed.net.co/editor_rc/tools/ckeditor/img/images/files/coin-master-rewards-app_GM406889139.pdfIn PDF document text
    • http://ginfed.net.co/editor_rc/tools/ckeditor/img/images/files/funny-roblox-avatar-ideas-free_GM431946152.pdfIn PDF document text
    • http://ginfed.net.co/editor_rc/tools/ckeditor/img/images/files/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://ginfed.net.co/editor_rc/tools/ckeditor/img/images/files/roblox-how-to-change-your-name-for-free-2021_GM431946152.pdfIn PDF document text
    • http://ginfed.net.co/editor_rc/tools/ckeditor/img/images/files/byfanatics-co-free-robux_GM431946152.pdfIn PDF document text
    • http://ginfed.net.co/editor_rc/tools/ckeditor/img/images/files/free-robux-and-tix-no-survey_GM431946152.pdfIn PDF document text
    • http://ginfed.net.co/editor_rc/tools/ckeditor/img/images/files/roblox-free-online-game_GM431946152.pdfIn PDF document text
    • http://ginfed.net.co/editor_rc/tools/ckeditor/img/images/files/microsoft-bing-robux_GM431946152.pdfIn PDF document text
    • http://ginfed.net.co/editor_rc/tools/ckeditor/img/images/files/free-coin-app_GM406889139.pdfIn PDF document text
    • http://ginfed.net.co/editor_rc/tools/ckeditor/img/images/files/free-robux-no-human-verifaction-and-survey_GM431946152.pdfIn PDF document text
    • http://ginfed.net.co/editor_rc/tools/ckeditor/img/images/files/how-to-hack-rich-old-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://ginfed.net.co/editor_rc/tools/ckeditor/img/images/files/roblox-controversy_GM431946152.pdfIn PDF document text
    • http://ginfed.net.co/editor_rc/tools/ckeditor/img/images/files/roblox-sexually-abused_GM431946152.pdfIn PDF document text
    • http://ginfed.net.co/editor_rc/tools/ckeditor/img/images/files/free-robux-discord-ggroups_GM431946152.pdfIn PDF document text
    • http://ginfed.net.co/editor_rc/tools/ckeditor/img/images/files/free-spins-on-coin-master-game_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_off000033a8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33A8 23284 bytes
SHA-256: d87b2156e2bcd4fe888f28e14f63b9e041163968c203521d1f59996902503ca2
font_01_sfnt_off0000681d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x681D 18336 bytes
SHA-256: 23f71a9ba4d854b783c042dde3b810d75211435ebb04f16eb6963276a01a3aa2

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