Malicious PDF — malware analysis report

Static analysis result for SHA-256 46a8b1ceb2818f88…

MALICIOUS

PDF

33.9 KB Created: 2021-06-18 22:07:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 219e184e5dbbbb8e29edd088152dc7f6 SHA-1: 92f731cd8db2cd67d8ac30bb7718e6da61978997 SHA-256: 46a8b1ceb2818f882ead80622e5167024066c98490d04793e1aadd36a3aeaf4a
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains numerous embedded URLs and a "link farm" structure, strongly suggesting it is designed to redirect users to external sites. The document body and extracted URLs indicate a lure for free game items, likely leading to malware or unwanted software downloads. The ML classifier also flagged this PDF as malicious with high confidence.

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/free-roblox-accounts-not-taken-game-hack
    • https://lib.btkljogja.or.id/repository/minecraft-windows-10-edition-unlock-full-game-free_GM479516143.pdf
    • https://lib.btkljogja.or.id/repository/get-me-robux_GM431946152.pdf
    • https://lib.btkljogja.or.id/repository/coin-master-daily_GM406889139.pdf
    • https://lib.btkljogja.or.id/repository/coin-master-free-daily-spins-and-coins_GM406889139.pdf
    • https://lib.btkljogja.or.id/repository/coin-master-free_GM406889139.pdf
    • https://lib.btkljogja.or.id/repository/is-hello-neighbour-free-to-download-of-roblox_GM431946152.pdf
    • https://lib.btkljogja.or.id/repository/roblox-free-shirt-templates-white-suit_GM431946152.pdf
    • https://lib.btkljogja.or.id/repository/free-roblox-accounts-2021-with-robux_GM431946152.pdf
    • https://lib.btkljogja.or.id/repository/free-coin-master-spins-2021_GM406889139.pdf
    • https://lib.btkljogja.or.id/repository/how-do-i-get-free-spins-on-coin-master_GM406889139.pdf
    • https://lib.btkljogja.or.id/repository/how-do-i-get-free-robux_GM431946152.pdf
    • https://lib.btkljogja.or.id/repository/how-to-get-free-robux-fast_GM431946152.pdf
    • https://lib.btkljogja.or.id/repository/free-roblox-sparkle-time-shirt_GM431946152.pdf
    • https://lib.btkljogja.or.id/repository/minecraft-java-account-free_GM479516143.pdf
    • https://lib.btkljogja.or.id/repository/free-robux-sites-that-work_GM431946152.pdf
    • https://lib.btkljogja.or.id/repository/inf-jump-hack-roblox_GM431946152.pdf
    • https://lib.btkljogja.or.id/repository/coin-master-ios-hack-download_GM406889139.pdf
    • https://lib.btkljogja.or.id/repository/google-how-can-i-get-free-robux_GM431946152.pdf
    • https://lib.btkljogja.or.id/repository/can-you-really-hack-coin-master-ios_GM406889139.pdf
    • https://lib.btkljogja.or.id/repository/free-800-robux-roblox_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002ef8.bin
09d026f222980104912377a34da045d98056b06b31661d28286b269d2e2cae8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2EF8 21864 bytes
font_01_sfnt_off00005f48.bin
0d0479ba1ff95fa5e8ca95b03a2e0493359e5d5afbcbfb8641634d39ab0e8eed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F48 19064 bytes

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