Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a1c2f5ac3bcadf6…

MALICIOUS

PDF

34.8 KB Created: 2021-06-18 18:02:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 65c13049018268847e526c501a6b3cd1 SHA-1: bfa7abe9709c14bcfa4f15cdbb53ebd3e92c4c1c SHA-256: 7a1c2f5ac3bcadf6dbc4266a42fa8629190975d4ad40ff84044ba2867b211bb4
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs and a document body that promotes free in-game currency and accounts for popular games. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm designed to direct users to potentially malicious or scam websites. The ML classifier also strongly flagged this PDF as malicious.

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-account-ebay-game-hack
    • http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/how-to-get-free-robux-no-scam_GM431946152.pdf
    • http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/free-robux-no-apps-to-download_GM431946152.pdf
    • http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/como-hackear-roblox-para-tener-robux-gratis-2021_GM431946152.pdf
    • http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/collect-robux_GM431946152.pdf
    • http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/coin-master-free-pet-food-links_GM406889139.pdf
    • http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/you-promised-my-son-free-robux_GM431946152.pdf
    • http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/how-to-install-minecraft-for-free_GM479516143.pdf
    • http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/are-there-any-coin-master-hacks-that-actually-work_GM406889139.pdf
    • http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/coin-master-hack-iosgods_GM406889139.pdf
    • http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/i-want-robux_GM431946152.pdf
    • http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/minecraft-bedrock-free-server-hosting_GM479516143.pdf
    • http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/hack-de-roblox-para-tener-robux-gratis_GM431946152.pdf
    • http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/is-java-minecraft-free_GM479516143.pdf
    • http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/hack-roblox-no-virus_GM431946152.pdf
    • http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/free-robux-com-no-verification_GM431946152.pdf
    • http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/master-coin-free_GM406889139.pdf
    • http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/free-coins-spins-on-coin-master_GM406889139.pdf
    • http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/coin-master-free-cards-2021_GM406889139.pdf
    • http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/roblox-free-robux-com_GM431946152.pdf
    • http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/get-free-spins-coin-master-2021_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000030c7.bin
5e231923e7df52038af032c7c6f043799088c315d8ed81353a4ccc31b6f24f85		 pdf-font-stream PDF embedded font (sfnt) at offset 0x30C7 22540 bytes
font_01_sfnt_off000062f3.bin
03a0d41a07a2cf4edf37b17246739f8541bb8e1fb49a70d3c739fd8b097b2122		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62F3 19072 bytes

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