Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a91632503e9f85c…

MALICIOUS

PDF

35.4 KB Created: 2021-07-06 05:19:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: e04343fd3b4ceb0530d46f8cb32ea2f2 SHA-1: 873a78b3d48618d6f52c967321225f67fed8a105 SHA-256: 3a91632503e9f85cc5489f4b0b7ae41da9d8b9a294fa240b5e0a0e894725b8fe
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous embedded links, many of which point to external websites offering game-related cheats and freebies. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of such links, suggesting a link farm or phishing attempt. The ML classifier also flagged this PDF as malicious with high confidence. The primary attack pattern involves luring users to click these links, likely to a site that either hosts malicious content or attempts to phish for credentials.

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.tw/app/406889139/coin-master-free-2021-spin-link-game-hack
    • http://library.itekes-bali.ac.id/repository/how-to-log-out-of-coin-master_GM406889139.pdf
    • http://library.itekes-bali.ac.id/repository/update-coin-master-free-spins_GM406889139.pdf
    • http://library.itekes-bali.ac.id/repository/free-headphones-roblox-2021_GM431946152.pdf
    • http://library.itekes-bali.ac.id/repository/how-to-get-free-roblox-coins_GM431946152.pdf
    • http://library.itekes-bali.ac.id/repository/coin-master-free-spin-and-coins-links-2021_GM406889139.pdf
    • http://library.itekes-bali.ac.id/repository/roblox-phantom-forces-level-hack_GM431946152.pdf
    • http://library.itekes-bali.ac.id/repository/body-roblox_GM431946152.pdf
    • http://library.itekes-bali.ac.id/repository/coin-master-hack-tool-2021_GM406889139.pdf
    • http://library.itekes-bali.ac.id/repository/coin-master-free-cards_GM406889139.pdf
    • http://library.itekes-bali.ac.id/repository/roblox-cheat-engine-bypass-2021-download_GM431946152.pdf
    • http://library.itekes-bali.ac.id/repository/coin-master-free-spins-hack-without-human-verification_GM406889139.pdf
    • http://library.itekes-bali.ac.id/repository/roblox-hack-2021exe-download_GM431946152.pdf
    • http://library.itekes-bali.ac.id/repository/cheat-to-add-money-to-roblox-lumber_GM431946152.pdf
    • http://library.itekes-bali.ac.id/repository/roblox-copy-game-hack_GM431946152.pdf
    • http://library.itekes-bali.ac.id/repository/how-to-get-free-robux-on-laptop_GM431946152.pdf
    • http://library.itekes-bali.ac.id/repository/2021-roblox_GM431946152.pdf
    • http://library.itekes-bali.ac.id/repository/free-spins-coin-master-hack-2021_GM406889139.pdf
    • http://library.itekes-bali.ac.id/repository/what-are-some-free-roblox-reedem-codes_GM431946152.pdf
    • http://library.itekes-bali.ac.id/repository/free-robux-no-email-or-human-verification_GM431946152.pdf
    • http://library.itekes-bali.ac.id/repository/coin-master-hack-that-actually-works_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003328.bin
bc83d828df083055efee0496c88956cc380b1c00b125f5bfd4e2c5b532e97aa8		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3328 22932 bytes
font_01_sfnt_off0000666c.bin
96324e6ce0c81689c6b9eecc120e41c8c4a64b67d53a9c8495a7c5a7aa900936		 pdf-font-stream PDF embedded font (sfnt) at offset 0x666C 18748 bytes

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