Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2064cac1021e215…

MALICIOUS

PDF

44.6 KB Created: 2021-06-08 21:55:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: c9bb7ffed4c7b30349c3007055f37774 SHA-1: d6a11075dec8cfc1b13d939bac7f84548236d63b SHA-256: c2064cac1021e2158fc8f5bd581a49fa09753d24b6023fb5e8220af87eab204c
102 Risk Score

Malware Insights

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

The PDF file contains numerous links to external websites, many of which are structured as SEO link farms. The document body, though partially corrupted, suggests a lure for free in-game currency or accounts, such as for Roblox or Coin Master. The presence of a malicious ML classification and a high number of external links strongly indicates a phishing or scamming attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.tw/app/431946152/free-bc-roblox-accounts-2021-game-hack
    • http://library.ft.upnvj.ac.id/repository/freerobuxhack-us_GM431946152.pdf
    • http://library.ft.upnvj.ac.id/repository/facebook-coin-master-hack_GM406889139.pdf
    • http://library.ft.upnvj.ac.id/repository/free-roblox-accounts-with-robux-2021_GM431946152.pdf
    • http://library.ft.upnvj.ac.id/repository/wurst-commands_GM479516143.pdf
    • http://library.ft.upnvj.ac.id/repository/roblox-sexually_GM431946152.pdf
    • http://library.ft.upnvj.ac.id/repository/how-to-get-free-robux-easy-2021_GM431946152.pdf
    • http://library.ft.upnvj.ac.id/repository/how-to-get-roblox-premium-for-free_GM431946152.pdf
    • http://library.ft.upnvj.ac.id/repository/www-roblox-com-free-robux_GM431946152.pdf
    • http://library.ft.upnvj.ac.id/repository/how-to-get-gold-cards-on-coin-master-hack_GM406889139.pdf
    • http://library.ft.upnvj.ac.id/repository/how-to-get-free-robux-hack-2021_GM431946152.pdf
    • http://library.ft.upnvj.ac.id/repository/coin-master-apk-hack-2021-ios_GM406889139.pdf
    • http://library.ft.upnvj.ac.id/repository/haktuts-coin-master-free-spin-link_GM406889139.pdf
    • http://library.ft.upnvj.ac.id/repository/free-robux-mobile_GM431946152.pdf
    • http://library.ft.upnvj.ac.id/repository/free-coin-master-spins-blog_GM406889139.pdf
    • http://library.ft.upnvj.ac.id/repository/get-gold-coin-master-village-hack_GM406889139.pdf
    • http://library.ft.upnvj.ac.id/repository/free-spins-on-coin-master-links-2021_GM406889139.pdf
    • http://library.ft.upnvj.ac.id/repository/best-tricks-co-robux_GM431946152.pdf
    • http://library.ft.upnvj.ac.id/repository/lua-script-hack-dinosaur-simulator-roblox_GM431946152.pdf
    • http://library.ft.upnvj.ac.id/repository/how-to-get-free-unlimited-robux_GM431946152.pdf
    • http://library.ft.upnvj.ac.id/repository/how-to-get-free-minecraft-alts_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004f5f.bin
dcfd2811aff72796a18328edf2c89f4ba2da8819d85ea0631dd55594fe3b45eb		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F5F 26292 bytes
font_01_sfnt_off00008aa0.bin
efd93b56bec543c93188676923c6b89244fbebf02a8d5e128cad7afe91693587		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AA0 18596 bytes

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