Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8153fd17ddeaf55…

MALICIOUS

PDF

35.0 KB Created: 2021-06-27 11:07:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 9af0af98d696702b339b8c933abd1cc1 SHA-1: 779d0e88c2888775e965b6c81e219287ee0d5fa3 SHA-256: f8153fd17ddeaf5547b0ea0a37dd1c9f9eda9356a79e87826c274ea783c89bb1
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous links to external resources, many of which are related to game hacks and cheats. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of these links, suggesting a malicious intent to direct users to potentially harmful content or phishing sites. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/how-to-become-a-hacker-in-roblox-on-phone-game-hack
    • https://elearning.man1samarinda.sch.id/__statics/gudangsoal/files/free-spins-coin-master-app_GM406889139.pdf
    • https://elearning.man1samarinda.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-hack-2021_GM431946152.pdf
    • https://elearning.man1samarinda.sch.id/__statics/gudangsoal/files/minecraft-java-free-download_GM479516143.pdf
    • https://elearning.man1samarinda.sch.id/__statics/gudangsoal/files/how-to-stop-a-hack-roblox_GM431946152.pdf
    • https://elearning.man1samarinda.sch.id/__statics/gudangsoal/files/free-robux-working_GM431946152.pdf
    • https://elearning.man1samarinda.sch.id/__statics/gudangsoal/files/how-to-get-free-snacks-on-coin-master_GM406889139.pdf
    • https://elearning.man1samarinda.sch.id/__statics/gudangsoal/files/what-is-a-minecraft-client_GM479516143.pdf
    • https://elearning.man1samarinda.sch.id/__statics/gudangsoal/files/roblox-hack-me_GM431946152.pdf
    • https://elearning.man1samarinda.sch.id/__statics/gudangsoal/files/free-coins-coin-master-blog_GM406889139.pdf
    • https://elearning.man1samarinda.sch.id/__statics/gudangsoal/files/robux-hack-2021_GM431946152.pdf
    • https://elearning.man1samarinda.sch.id/__statics/gudangsoal/files/free-robux-scam_GM431946152.pdf
    • https://elearning.man1samarinda.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-2021_GM406889139.pdf
    • https://elearning.man1samarinda.sch.id/__statics/gudangsoal/files/minecraft-free-download-apk-softonic_GM479516143.pdf
    • https://elearning.man1samarinda.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-blogspot_GM406889139.pdf
    • https://elearning.man1samarinda.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-games_GM431946152.pdf
    • https://elearning.man1samarinda.sch.id/__statics/gudangsoal/files/roblox-hax_GM431946152.pdf
    • https://elearning.man1samarinda.sch.id/__statics/gudangsoal/files/free-online-games-roblox-no-download_GM431946152.pdf
    • https://elearning.man1samarinda.sch.id/__statics/gudangsoal/files/how-to-hack-coins-in-mcpe-master_GM406889139.pdf
    • https://elearning.man1samarinda.sch.id/__statics/gudangsoal/files/how-to-get-hacks-on-minecraft_GM479516143.pdf
    • https://elearning.man1samarinda.sch.id/__statics/gudangsoal/files/free-coin-master-spins-2021_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000316f.bin
c5e2a9252b46d460c21ecfe914c3a2eb47355aa6bee9b3986c786905d3badd69		 pdf-font-stream PDF embedded font (sfnt) at offset 0x316F 22280 bytes
font_01_sfnt_off00006312.bin
6848d0416c88d6466013257ec1afc2d9b1286890084212ed34b88e8ce6d1bc44		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6312 19400 bytes

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