Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a8f6b68d31034db…

MALICIOUS

PDF

34.1 KB Created: 2021-06-18 22:17:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 10a04172ca9f90c37acc5f98372cf6e7 SHA-1: a6e28ba0a561fab909cacd7ecabf77503304ba51 SHA-256: 5a8f6b68d31034db0cddfb52708ce0e1c028ec6ce4c7acedd134152823ea5cbf
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs disguised as links to free game items or hacks, a common lure for phishing or malware distribution. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm designed to redirect users to malicious sites. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/purchase-iteam-free-pastebin-roblox-game-hack
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/lol-this-guy-tryed-to-hack-me-in-roblox_GM431946152.pdf
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/how-to-get-free-robux-without-paying_GM431946152.pdf
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/free-games-like-minecraft_GM479516143.pdf
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/free-robux-no-downloading-apps_GM431946152.pdf
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/free-robux-from-gravel-pit_GM431946152.pdf
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/how-do-i-get-free-spins-on-coin-master_GM406889139.pdf
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/free-robux-rewards_GM431946152.pdf
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/how-to-get-free-robux-on-roblox_GM431946152.pdf
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/how-to-get-free-tiktok-likes_GM835599320.pdf
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/free-tiktok-likes-no-survey_GM835599320.pdf
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/free-robux-without-downloading-anything_GM431946152.pdf
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/get-free-followers-on-tiktok_GM835599320.pdf
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/roblox-restaurant-tycoon-hack-script-pastebin_GM431946152.pdf
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/how-to-hack-roblox-games_GM431946152.pdf
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/free-roblox-executor_GM431946152.pdf
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/promo-codes-for-free-robux_GM431946152.pdf
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/cool-free-roblox-outfits_GM431946152.pdf
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/free-roblox-clipart_GM431946152.pdf
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/how-to-get-free-t-shirts-on-roblox-2021_GM431946152.pdf
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/is-it-possible-to-get-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002da5.bin
e51a18035c7024fa370bb94e5fd3985a6f610986bbbfd7a98fe1d4fa11b09066		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2DA5 22344 bytes
font_01_sfnt_off00005f5d.bin
a8d3ce60e72aa9991f444b2e6120b49b3287c1af7bf225dc03a52617ebd927d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F5D 19596 bytes

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