Malicious PDF — malware analysis report

Static analysis result for SHA-256 8aacc72b2ad5329f…

MALICIOUS

PDF

34.8 KB Created: 2021-07-04 07:53:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 25c12e6c3a593d72fe47a6afda1d0882 SHA-1: 2e81b17deceb94a97cb6a13b81799d36568429fc SHA-256: 8aacc72b2ad5329f6d3b5f186ce6f73ff83b5c5d8b15cca0af33a03be6b22009
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a document body that promotes free items and hacks for games like Roblox and Coin Master. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm designed to drive traffic to potentially malicious sites. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern is likely social engineering via a phishing attachment, aiming to trick users into visiting malicious URLs.

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.tw/app/431946152/earn-roblox-game-hack
    • http://lib.kunci.or.id/repository/http-bit-ly-get-free-robux_GM431946152.pdf
    • http://lib.kunci.or.id/repository/how-to-hack-in-someones-account-on-roblox-2021_GM431946152.pdf
    • http://lib.kunci.or.id/repository/roblox-pokemon-brick-bronze-shiny-hack_GM431946152.pdf
    • http://lib.kunci.or.id/repository/how-do-you-get-free-roblox_GM431946152.pdf
    • http://lib.kunci.or.id/repository/roblox-ben-10-universal-showdown-cheat-codes_GM431946152.pdf
    • http://lib.kunci.or.id/repository/free-coins-and-spins-for-coin-master-game_GM406889139.pdf
    • http://lib.kunci.or.id/repository/coin-master-100-free-spins-link_GM406889139.pdf
    • http://lib.kunci.or.id/repository/free-robux-co_GM431946152.pdf
    • http://lib.kunci.or.id/repository/roblox-gift-card-free-codes_GM431946152.pdf
    • http://lib.kunci.or.id/repository/roblox-elemental-battleground-hack-script_GM431946152.pdf
    • http://lib.kunci.or.id/repository/coin-master-33-hack-version-download_GM406889139.pdf
    • http://lib.kunci.or.id/repository/roblox-cheat-engine-wallhack_GM431946152.pdf
    • http://lib.kunci.or.id/repository/minecraft-free-no-download_GM479516143.pdf
    • http://lib.kunci.or.id/repository/reddit-coin-master-free-spins_GM406889139.pdf
    • http://lib.kunci.or.id/repository/minecraft-hack-2021_GM479516143.pdf
    • http://lib.kunci.or.id/repository/roblox-how-to-hack-accoutns_GM431946152.pdf
    • http://lib.kunci.or.id/repository/hack-de-roblox_GM431946152.pdf
    • http://lib.kunci.or.id/repository/free-robux-easy_GM431946152.pdf
    • http://lib.kunci.or.id/repository/coin-master-hack-pro-gamers_GM406889139.pdf
    • http://lib.kunci.or.id/repository/coin-master-apk-hack-35-8_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000031b8.bin
23e1c6c1cb5796deaa6e8ab166329408b45162b7adff58dc27f7dd48bf824bbe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x31B8 22772 bytes
font_01_sfnt_off00006489.bin
8cba056027220f5c23c1ca3699a63c26fe64a99975d9f84dc7ec4e72a8f0a8a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6489 18484 bytes

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