Malicious PDF — malware analysis report

Static analysis result for SHA-256 8440dba41bdd1067…

MALICIOUS

PDF

46.5 KB Created: 2021-05-19 10:30:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 3730797aebbc51ba418454ce490236de SHA-1: 851df3bbf0e639023221b3e21c5ac31ae68e6d21 SHA-256: 8440dba41bdd1067a47c3089a86b3b1c6fdefc33874601aa5c78a01d3cb912a4
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs and a document body that advertises free game hacks and currency, indicating a lure for users to download potentially malicious files. The PDF_SEO_LINK_FARM heuristic firing suggests a large number of these links are present, likely for SEO manipulation to attract victims. The ML_NYX_PDF_MALICIOUS score further supports the malicious nature of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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/microsoft-bing-free-robux-game-hack
    • http://www.lycee-langevin-wallon.com/images/roblox-com-hack_GM431946152.pdf
    • http://www.lycee-langevin-wallon.com/images/how-to-get-free-spins-in-coin-master_GM406889139.pdf
    • http://www.lycee-langevin-wallon.com/images/robux-link_GM431946152.pdf
    • http://www.lycee-langevin-wallon.com/images/minecraft-bedrock-download-pc-free_GM479516143.pdf
    • http://www.lycee-langevin-wallon.com/images/how-to-get-free-spins-on-coin-master-game_GM406889139.pdf
    • http://www.lycee-langevin-wallon.com/images/coin-master-card-hack-app_GM406889139.pdf
    • http://www.lycee-langevin-wallon.com/images/coin-master-unlimited-spins-apk-free-download_GM406889139.pdf
    • http://www.lycee-langevin-wallon.com/images/coin-master-apk-free-download_GM406889139.pdf
    • http://www.lycee-langevin-wallon.com/images/how-to-get-minecraft-for-free-on-xbox-one_GM479516143.pdf
    • http://www.lycee-langevin-wallon.com/images/coin-master-tricks-and-hacks_GM406889139.pdf
    • http://www.lycee-langevin-wallon.com/images/impact-minecraft-hack_GM479516143.pdf
    • http://www.lycee-langevin-wallon.com/images/free-roblox-groups_GM431946152.pdf
    • http://www.lycee-langevin-wallon.com/images/how-to-hack-m-coins-mcpe-master_GM406889139.pdf
    • http://www.lycee-langevin-wallon.com/images/robux-match_GM431946152.pdf
    • http://www.lycee-langevin-wallon.com/images/roblox-piano-hack_GM431946152.pdf
    • http://www.lycee-langevin-wallon.com/images/how-to-get-free-spins-grom-coin-master_GM406889139.pdf
    • http://www.lycee-langevin-wallon.com/images/can-u-get-free-robux_GM431946152.pdf
    • http://www.lycee-langevin-wallon.com/images/how-to-get-free-robux-without-download-apps-or-survey_GM431946152.pdf
    • http://www.lycee-langevin-wallon.com/images/free-robux-com_GM431946152.pdf
    • http://www.lycee-langevin-wallon.com/images/coin-master-free-fire_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004b7a.bin
f466db8c16a37527634b85f2d933c8a70da4b648bf9d26090b895683b76422f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B7A 25820 bytes
font_01_sfnt_off000085ea.bin
8e24205afdd13dcdea98f8150ef77dee4030e0e50a7c748783d1b4598e034a20		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85EA 3464 bytes
font_02_sfnt_off00009220.bin
f6da71d3ec7876d1f2450260025b1db4712d77c7886386833aafb50cc2347919		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9220 18720 bytes

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