Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b9366224f0f2930…

MALICIOUS

PDF

44.1 KB Created: 2021-06-03 23:28:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 9fe376efa27dd9e1f35d99478ba2d65b SHA-1: de08aad15235e62bdea47b6c8fe3cdac3d1ecd54 SHA-256: 9b9366224f0f2930d9f6bf44626af91eb055b93a646ae37a3e4c9e8591c81a99
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to sites offering game cheats and free virtual currency, indicating a link farm or phishing lure. The presence of a download button lure and password archive instructions suggests an attempt to trick users into downloading further malicious content. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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 https://netcdn.online/app/431946152/robuxmatchcon-game-hack
    • http://library.ft.upnvj.ac.id/repository/how-to-get-free-robux-not-a-scam_GM431946152.pdf
    • http://library.ft.upnvj.ac.id/repository/coin-master-free-spins-without-human-verification_GM406889139.pdf
    • http://library.ft.upnvj.ac.id/repository/rbxoffers-earn-free-robux_GM431946152.pdf
    • http://library.ft.upnvj.ac.id/repository/how-to-hack-to-get-robux_GM431946152.pdf
    • http://library.ft.upnvj.ac.id/repository/minecraft-java-edition-free-trial_GM479516143.pdf
    • http://library.ft.upnvj.ac.id/repository/coin-master-free-spins-and-coins-hack_GM406889139.pdf
    • http://library.ft.upnvj.ac.id/repository/free-robux-codes-no-verification_GM431946152.pdf
    • http://library.ft.upnvj.ac.id/repository/coin-master-free-spins-link-2021_GM406889139.pdf
    • http://library.ft.upnvj.ac.id/repository/free-spin-link-for-coin-master-game_GM406889139.pdf
    • http://library.ft.upnvj.ac.id/repository/lastrick-com-coin-master-hack_GM406889139.pdf
    • http://library.ft.upnvj.ac.id/repository/robux-generator_GM431946152.pdf
    • http://library.ft.upnvj.ac.id/repository/coin-master-2021_GM406889139.pdf
    • http://library.ft.upnvj.ac.id/repository/facebook-coin-master-free-spins-link_GM406889139.pdf
    • http://library.ft.upnvj.ac.id/repository/minecraft-clipart-free_GM479516143.pdf
    • http://library.ft.upnvj.ac.id/repository/roblox-robux-hack-generator_GM431946152.pdf
    • http://library.ft.upnvj.ac.id/repository/free-2021-robux_GM431946152.pdf
    • http://library.ft.upnvj.ac.id/repository/coin-master-free-spins-and-coins-2021_GM406889139.pdf
    • http://library.ft.upnvj.ac.id/repository/free-robux-cards_GM431946152.pdf
    • http://library.ft.upnvj.ac.id/repository/coin-master-daily-free-spins-2021_GM406889139.pdf
    • http://library.ft.upnvj.ac.id/repository/link-for-free-spins-on-coin-master_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004f49.bin
de6d19da6d2e42614711bd35828a7a8d35f8b4db406b759073bb1fcb2d1ec067		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F49 25792 bytes
font_01_sfnt_off000088a3.bin
1772f30b32917b5488ab36612215aea49128e39afdb0bc668ac2eaf3111ec9c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88A3 18608 bytes

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