Malicious PDF — malware analysis report

Static analysis result for SHA-256 3df72829ef95b7d2…

MALICIOUS

PDF

42.9 KB Created: 2021-05-14 20:45:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: c7c947fdc06c2b8ccc246e32b2576edf SHA-1: 201b48ce8c7b47b1bd9386823b9f9b854883640a SHA-256: 3df72829ef95b7d254c7afcca810c2646cd5f8ea1944ce3742db75c4d7edda49
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of external links, many of which are related to game hacks and cheats, indicating a link farm or phishing attempt. The ML classifier strongly flagged this PDF as malicious. While no scripts were directly extracted, the embedded URLs suggest the document is designed to redirect users to potentially malicious websites or downloaders.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.xyz/app/406889139/free-spin-sites-for-coin-master-game-hack PDF link annotation
    • http://bressanassessoria.com.br/images/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://bressanassessoria.com.br/images/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://bressanassessoria.com.br/images/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://bressanassessoria.com.br/images/coin-master-hack-apk-app_GM406889139.pdfIn PDF document text
    • http://bressanassessoria.com.br/images/get-free-spins-coin-master-october-2021_GM406889139.pdfIn PDF document text
    • http://bressanassessoria.com.br/images/try-minecraft-free_GM479516143.pdfIn PDF document text
    • http://bressanassessoria.com.br/images/roblox-g_GM431946152.pdfIn PDF document text
    • http://bressanassessoria.com.br/images/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • http://bressanassessoria.com.br/images/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://bressanassessoria.com.br/images/free-coins-2021-coin-master-link_GM406889139.pdfIn PDF document text
    • http://bressanassessoria.com.br/images/how-to-get-free-pets-in-adopt-me-roblox_GM431946152.pdfIn PDF document text
    • http://bressanassessoria.com.br/images/coin-master-apk_GM406889139.pdfIn PDF document text
    • http://bressanassessoria.com.br/images/coin-master-hack-mod-game-download_GM406889139.pdfIn PDF document text
    • http://bressanassessoria.com.br/images/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://bressanassessoria.com.br/images/coin-master-free-spins-link-2021-hack_GM406889139.pdfIn PDF document text
    • http://bressanassessoria.com.br/images/easy-robux-today-com_GM431946152.pdfIn PDF document text
    • http://bressanassessoria.com.br/images/earn-robux-websites_GM431946152.pdfIn PDF document text
    • http://bressanassessoria.com.br/images/how-to-get-roblox-credit-for-free_GM431946152.pdfIn PDF document text
    • http://bressanassessoria.com.br/images/free-coin-master-spins-daily_GM406889139.pdfIn PDF document text
    • http://bressanassessoria.com.br/images/free-spin-and-win-coin-master_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_003_off0000491b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x491B 26504 bytes
SHA-256: 9baeb8a28fd29feb1517e504279cdbc7538071c7183470131129a6d90e43efe4
font_01_sfnt_off000086ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86AE 17884 bytes
SHA-256: a210d42f6902d7d9d5bff07919c8107c405d033dd36282e8d99cfff98ec98e98

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