Malicious PDF — malware analysis report

Static analysis result for SHA-256 700205936fffff2c…

MALICIOUS

PDF

44.3 KB Created: 2021-06-13 23:02:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 7b4d540cf9a60764cdc5dcb874fba462 SHA-1: cfd7e4c019b90797cad6bbbd75d3aef65a93a9b1 SHA-256: 700205936fffff2c733915d843286cbc80a7fe09c68ccad64a5f688e4a1c5401
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was generated by wkhtmltopdf and contains numerous embedded URLs, many of which are part of a link farm. The document body and extracted URLs suggest a lure for game-related cheats and hacks, such as "free Robux", which is a common tactic for distributing malware. The ML classifier also flagged this PDF as malicious with high confidence.

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/robux-gratis-2021-hack-game-hack
    • http://legs11.co.za/images/free-robux-link_GM431946152.pdf
    • http://legs11.co.za/images/haw-to-get-free-items-in-roblox-taglog-2021-march_GM431946152.pdf
    • http://legs11.co.za/images/pokemon-go-free-poke-coin_GM1094591345.pdf
    • http://legs11.co.za/images/free-spins-for-coin-master-game_GM406889139.pdf
    • http://legs11.co.za/images/coin-master-free-cards-link_GM406889139.pdf
    • http://legs11.co.za/images/free-roblox-vpn_GM431946152.pdf
    • http://legs11.co.za/images/coin-master-free-spins-link-may-2021_GM406889139.pdf
    • http://legs11.co.za/images/free-coins-coin-master-link_GM406889139.pdf
    • http://legs11.co.za/images/minecraft-pe-015-0-apk-free-download_GM479516143.pdf
    • http://legs11.co.za/images/free-roblox-games-for-guest_GM431946152.pdf
    • http://legs11.co.za/images/how-to-get-free-robux-2021-easy_GM431946152.pdf
    • http://legs11.co.za/images/roblox-is-getting-hacked_GM431946152.pdf
    • http://legs11.co.za/images/free-robux-no-verification-no-download_GM431946152.pdf
    • http://legs11.co.za/images/give-me-free-robux_GM431946152.pdf
    • http://legs11.co.za/images/coin-master-free-rewards-link_GM406889139.pdf
    • http://legs11.co.za/images/how-to-get-free-diamonds-on-royale-high-roblox-2021_GM431946152.pdf
    • http://legs11.co.za/images/ways-to-get-free-robux_GM431946152.pdf
    • http://legs11.co.za/images/hacks-for-coin-master_GM406889139.pdf
    • http://legs11.co.za/images/doctor-louie-roblox_GM431946152.pdf
    • http://legs11.co.za/images/free-games-like-minecraft_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004968.bin
81e9c03b38eaf3b948f6fd9c64c840e7e9681f71e2fdb920d67e06da99c2214f		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4968 27816 bytes
font_01_sfnt_off000088dc.bin
433035b91e0f22ccb2243895363d42fb3cbfc793c44802c164475faa2726930b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88DC 18872 bytes

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