Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3c7c2fc12966e88…

MALICIOUS

PDF

34.7 KB Created: 2021-06-28 01:39:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: e5089adb65d9ee8256d97536ace27e3a SHA-1: 295c72b91242187177a8650fe4d1e5da329f975a SHA-256: b3c7c2fc12966e888e8b68d47ed43db3b079e61d550b9b13d19fb4bd84949483
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links and a prominent call-to-action, suggesting a phishing or social engineering attack. The document body and extracted URLs explicitly mention 'Robux hacks' and 'game hacks', indicating a lure to trick users into downloading potentially malicious content. The heuristic 'PDF_SEO_LINK_FARM' further supports the malicious intent by identifying a large number of external links, likely for SEO manipulation or to host further malicious content.

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/robux-secret-forum-hack-v11-game-hack
    • https://lms.mtsn3trenggalek.sch.id/__statics/gudangsoal/files/free-robux-games-that-actually-work_GM431946152.pdf
    • https://lms.mtsn3trenggalek.sch.id/__statics/gudangsoal/files/pastbin-robux-hacks-for-free_GM431946152.pdf
    • https://lms.mtsn3trenggalek.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-for-free-ios_GM479516143.pdf
    • https://lms.mtsn3trenggalek.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-2021-no-waiting_GM431946152.pdf
    • https://lms.mtsn3trenggalek.sch.id/__statics/gudangsoal/files/how-to-get-free-tickets-in-roblox_GM431946152.pdf
    • https://lms.mtsn3trenggalek.sch.id/__statics/gudangsoal/files/free-real-robux-generator_GM431946152.pdf
    • https://lms.mtsn3trenggalek.sch.id/__statics/gudangsoal/files/roblox-money-hack-free-download_GM431946152.pdf
    • https://lms.mtsn3trenggalek.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-t_GM431946152.pdf
    • https://lms.mtsn3trenggalek.sch.id/__statics/gudangsoal/files/how-to-do-a-peppa-hack-roblox_GM431946152.pdf
    • https://lms.mtsn3trenggalek.sch.id/__statics/gudangsoal/files/free-roblox-cards-generator-username_GM431946152.pdf
    • https://lms.mtsn3trenggalek.sch.id/__statics/gudangsoal/files/free-robux-guuudinfo_GM431946152.pdf
    • https://lms.mtsn3trenggalek.sch.id/__statics/gudangsoal/files/dexode-hack-to-survive-roblox_GM431946152.pdf
    • https://lms.mtsn3trenggalek.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-human-verification_GM431946152.pdf
    • https://lms.mtsn3trenggalek.sch.id/__statics/gudangsoal/files/free-robux-codes-no-verification_GM431946152.pdf
    • https://lms.mtsn3trenggalek.sch.id/__statics/gudangsoal/files/its-free-roblox-meme_GM431946152.pdf
    • https://lms.mtsn3trenggalek.sch.id/__statics/gudangsoal/files/robux-hacks-that-actually-work-2021_GM431946152.pdf
    • https://lms.mtsn3trenggalek.sch.id/__statics/gudangsoal/files/adopt-me-roblox-hacks_GM431946152.pdf
    • https://lms.mtsn3trenggalek.sch.id/__statics/gudangsoal/files/free-robux-no-download-no-human-verification-2021_GM431946152.pdf
    • https://lms.mtsn3trenggalek.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-games_GM431946152.pdf
    • https://lms.mtsn3trenggalek.sch.id/__statics/gudangsoal/files/roblox-node-cheat-engine_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000030c8.bin
1b9ccd9b3684ebe6ea8376afff8b23cce5637f02c38015cf3b6c021ed85920cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x30C8 21932 bytes
font_01_sfnt_off0000616e.bin
a665b307ec1a745e433d643f81ab01b013b200f5b655fbce86670a6f2ff97275		 pdf-font-stream PDF embedded font (sfnt) at offset 0x616E 19488 bytes

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