Malicious PDF — malware analysis report

Static analysis result for SHA-256 c20f60cefbc13032…

MALICIOUS

PDF

38.6 KB Created: 2021-06-30 13:36:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 5d81c0f6c1085e98e1bad35362c7ec32 SHA-1: 992b3ec2d29ea9f5d402e3e93a995c177e4a9e36 SHA-256: c20f60cefbc130321f9ece7cb8510158f67b1839301c3a9637479568534ca32d
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a "link farm" designed to direct users to external sites, likely for downloading malware or engaging in scams. The document body text and extracted URLs explicitly mention "Robux Hack" and "game hack", indicating a lure for potentially fraudulent content. While no scripts were extracted, the PDF structure and extensive external links suggest a malicious intent to redirect users to harmful resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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/how-to-get-500-billion-robux-hack-2021-game-hack
    • http://lib.fekon.untad.ac.id/repository/get-me-free-robux_GM431946152.pdf
    • http://lib.fekon.untad.ac.id/repository/free-robux-for-kids-no-verification_GM431946152.pdf
    • http://lib.fekon.untad.ac.id/repository/how-to-get-free-robux-flamingo_GM431946152.pdf
    • http://lib.fekon.untad.ac.id/repository/minecraft-hacked-client-download_GM479516143.pdf
    • http://lib.fekon.untad.ac.id/repository/coin-master-hack-tool-access-online-generator_GM406889139.pdf
    • http://lib.fekon.untad.ac.id/repository/coin-master-daily-free-coins-link_GM406889139.pdf
    • http://lib.fekon.untad.ac.id/repository/roblox-free-skin-robuxed-no-robux_GM431946152.pdf
    • http://lib.fekon.untad.ac.id/repository/free-daily-spins-from-coin-master_GM406889139.pdf
    • http://lib.fekon.untad.ac.id/repository/roblox-free-online-no-installing_GM431946152.pdf
    • http://lib.fekon.untad.ac.id/repository/codes-how-to-get-free-robux_GM431946152.pdf
    • http://lib.fekon.untad.ac.id/repository/how-to-hack-your-friends-account-on-roblox_GM431946152.pdf
    • http://lib.fekon.untad.ac.id/repository/coin-master-hack-apk-2021_GM406889139.pdf
    • http://lib.fekon.untad.ac.id/repository/free-robux-without-verification-or-survey_GM431946152.pdf
    • http://lib.fekon.untad.ac.id/repository/robux-hack-script-pastebin-2021_GM431946152.pdf
    • http://lib.fekon.untad.ac.id/repository/how-to-get-free-robux-with-mods_GM431946152.pdf
    • http://lib.fekon.untad.ac.id/repository/roblox-how-to-get-in-bloxburg-for-free-2021_GM431946152.pdf
    • http://lib.fekon.untad.ac.id/repository/spins-coin-master_GM406889139.pdf
    • http://lib.fekon.untad.ac.id/repository/free-stuff-on-roblox-on-computer_GM431946152.pdf
    • http://lib.fekon.untad.ac.id/repository/how-to-get-free-robux-and-tix-on-pc_GM431946152.pdf
    • http://lib.fekon.untad.ac.id/repository/coin-master-free-spins-and-coins-daily_GM406889139.pdf
    • https://www.roblox.com/.I
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003c4c.bin
a752b9e504af21128619c9ba651a2ba17cd88424e93966dfad2e01d660e9ab8b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3C4C 22992 bytes
font_01_sfnt_off00006fcd.bin
d099d82a9d2ca32d32f140377e03e504d20728a38f9c8f65ef400e515c56c7df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FCD 19720 bytes

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