Malicious PDF — malware analysis report

Static analysis result for SHA-256 2957c03751d07c63…

MALICIOUS

PDF

35.0 KB Created: 2021-06-27 12:47:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 111b305cf8387e993ab9f8af0b43ab83 SHA-1: 53690034ad60bb6973805664ba0883c971d8099a SHA-256: 2957c03751d07c63e388fe6e853b73967228e2f020b0ee6cd1c6d40b6a232b5e
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, many of which are presented as download opportunities for game cheats and hacks. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a tactic to distribute various malicious or unwanted files. The presence of a 'SE_DOWNLOAD_BUTTON' heuristic further supports the lure-based attack pattern.

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/cheat-engine-roblox-lumber-tycoon-2-game-hack PDF link annotation
    • https://nature-air.com.tw/upload/files/descargar-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/how-to-get-10k-robux-by-redeem-code-free_GM431946152.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/roblox-free-boombox-script-site-v3rmillionnet_GM431946152.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/free-coin-master-spins-daily_GM406889139.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/coin-free-spin_GM406889139.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/hacks-for-roblox-booga-booga_GM431946152.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/free-robux-script-game-guardian_GM431946152.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/hacking-third-party-client-roblox_GM431946152.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/how-to-get-minecraft-pe-for-free-ios_GM479516143.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/roblox-free-cards-codes-2021_GM431946152.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/roblox-how-to-get-free-robux-from-groups_GM431946152.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/wurst-minecraft_GM479516143.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/toolbox-for-minecraft-pe-mod-apk_GM479516143.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/how-to-get-minecraft-bedrock-edition-on-pc-for-free_GM479516143.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/minecraft-free-download_GM479516143.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/minecraft-java-edition-download-free_GM479516143.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/roblox-free-executor_GM431946152.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/comment-hacker-le-jeu-roblox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003038.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3038 22412 bytes
SHA-256: 42c72cbf64fcfaf809bb8167c72bb94f8655e037e5d830beecdb200649c7c029
font_01_sfnt_off00006227.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6227 19580 bytes
SHA-256: d762d018ed2e0cc93a7575a96266052108bcaa71600dda7490c208348c3c843e

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