Malicious PDF — malware analysis report

Static analysis result for SHA-256 de273404148db4ae…

MALICIOUS

PDF

46.4 KB Created: 2021-05-20 02:22:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 03f67fc6777566479cc0db11c5562a37 SHA-1: e0822217f16d2c03ab97a103ff8b9e805f4804eb SHA-256: de273404148db4ae5219061ee11800cfff64733535bf9d22f763a00569efc535
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous external links, many of which point to other PDF files, suggesting a link farm designed to attract traffic or distribute malware. The presence of a URL like 'https://netcdn.xyz/app/431946152/free-robux-no-verification-no-download-2021-game-hack' and the heuristic 'PDF_SEO_LINK_FARM' strongly indicate a malicious intent to redirect users to potentially harmful content. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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/431946152/free-robux-no-verification-no-download-2021-game-hack
    • http://bagliomangiapane.com/images/minecraft-games-free-to-play-online_GM479516143.pdf
    • http://bagliomangiapane.com/images/hack-crack-for-coin-master-currency_GM406889139.pdf
    • http://bagliomangiapane.com/images/do-you-get-minecraft-windows-10-for-free_GM479516143.pdf
    • http://bagliomangiapane.com/images/robux-app_GM431946152.pdf
    • http://bagliomangiapane.com/images/coin-master-free-spins-may-11-2021_GM406889139.pdf
    • http://bagliomangiapane.com/images/free-robux-download_GM431946152.pdf
    • http://bagliomangiapane.com/images/free-robux-gift-card_GM431946152.pdf
    • http://bagliomangiapane.com/images/how-can-i-get-free-robux_GM431946152.pdf
    • http://bagliomangiapane.com/images/free-robux-quiz_GM431946152.pdf
    • http://bagliomangiapane.com/images/coin-master-free-spins-cheat-deutsch_GM406889139.pdf
    • http://bagliomangiapane.com/images/free-robux-no-human-verification-and-no-survey_GM431946152.pdf
    • http://bagliomangiapane.com/images/free-coin-master-spins-2021_GM406889139.pdf
    • http://bagliomangiapane.com/images/free-coin-master-coins-and-spins_GM406889139.pdf
    • http://bagliomangiapane.com/images/robux-free-com_GM431946152.pdf
    • http://bagliomangiapane.com/images/coin-master-free-spins-deutsch-download-ios-link_GM406889139.pdf
    • http://bagliomangiapane.com/images/coin-master-gold-cards-free_GM406889139.pdf
    • http://bagliomangiapane.com/images/windows-10-minecraft-free-with-java_GM479516143.pdf
    • http://bagliomangiapane.com/images/free-robux-no-generator_GM431946152.pdf
    • http://bagliomangiapane.com/images/coin-master-gold-cards-hack_GM406889139.pdf
    • http://bagliomangiapane.com/images/coin-master-game-android-free-download_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004b11.bin
1f1090f7fe5c7f316d5dc3f174d56eed897dbe72abbfa32b28cb95ebc545ef9a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B11 29500 bytes
font_01_sfnt_off00008f26.bin
6d060c19cfdcabcdc6bddd80792e5ccefe5b0efd90c0cd3f16f1565492dd4e8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F26 19584 bytes

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