Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ca84b2746b9ed3c…

MALICIOUS

PDF

32.9 KB Created: 2021-06-27 11:09:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 19cfca341f4ae367ff3b4c52b65acfdb SHA-1: 7b914b7b46e06cec4c139ded97238660585ca757 SHA-256: 1ca84b2746b9ed3c56d246e902b1ac8cc004d343a95849b043dcc6e033742d07
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a heuristic firing for a PDF link farm, suggesting it is designed to redirect users to external sites. The document body and extracted URLs indicate a lure related to game cheats and hacks for popular games like Roblox and Coin Master. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is intended to distribute harmful content or lead users to phishing sites.

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/concole-roblox-hack-game-hack
    • http://elibrary.smknesbu.sch.id/repository/coin-master-links-to-free-spins_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/how-to-make-a-minecraft-server-for-free-java_GM479516143.pdf
    • http://elibrary.smknesbu.sch.id/repository/how-to-put-shirts-for-free-on-roblox_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/how-to-get-free-robux-redeem-card-codes_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/coin-master-free-spins-link-blogspot-today_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/minecraft-beta-free_GM479516143.pdf
    • http://elibrary.smknesbu.sch.id/repository/how-to-get-free-robux-app_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/coin-master-free-spin-group_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/how-to-coin-master-spin-hack_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/hacking-money-in-vehicle-sim-roblox_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/roblox-cheat-codes-for-money-xbox-one_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/80-free-spins-coin-master_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/roblox-miscreated-cheats_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/roblox-gift-card-hack-2021_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/free-robux-websites-that-work_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/robux-hack-may-2021-no-survey_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/how-to-get-a-free-face-on-roblox-2021_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/hacks-roblox-infinete-jump_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/roblox-hack-that-works-jailbreak_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/robux-generator-2021_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002dde.bin
96ab106c5edc674a9d2cb0522326a05603589b934a115a550746753ffc4d255b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2DDE 21484 bytes
font_01_sfnt_off00005c4f.bin
4ab4bd0246df2a449c04b1cefa36361f1a6d24b47e5bd6755245f5f4df8b83da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C4F 18656 bytes

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