Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9e87674c096dc5b…

MALICIOUS

PDF

33.3 KB Created: 2021-07-06 23:20:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: f0ca0f812eae0ee810c7b096696bf74a SHA-1: e11e95e4c98f3128d1145241df934af65d491569 SHA-256: c9e87674c096dc5b49226a4088ad6e2a891d789d27ad6110779cd11bb21e247b
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external resources advertising game hacks and cheats, with a primary link to 'roblox-piano-hack-game-hack'. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of such links, suggesting a coordinated effort to distribute malicious content. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the content strongly suggest an attempt to trick users into downloading malware or visiting malicious sites.

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/roblox-piano-hack-game-hack
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/easy-how-to-get-free-robux_GM431946152.pdf
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/free-robux-legit_GM431946152.pdf
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/coin-master-hack-pc_GM406889139.pdf
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/how-to-get-free-stuff-on-roblox-2021_GM431946152.pdf
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/how-to-hack-to-get-robux_GM431946152.pdf
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/how-to-get-free-cards-in-coin-master_GM406889139.pdf
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/best-free-minecraft-hacked-client_GM479516143.pdf
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/coin-master-free-cards-hack_GM406889139.pdf
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/free-online-minecraft-server_GM479516143.pdf
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/coin-master-ios-hack-download_GM406889139.pdf
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/get-free-minecraft-account_GM479516143.pdf
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/free-wins-in-anarchy-roblox_GM431946152.pdf
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/free-robux-generator-2021_GM431946152.pdf
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/free-robux-no-human-verification_GM431946152.pdf
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/free-admin-roblox_GM431946152.pdf
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/coin-master-hack-spin-ios_GM406889139.pdf
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/roblox-cheat-engine-bypass-unpatched_GM431946152.pdf
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/free-membership-roblox_GM431946152.pdf
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/how-to-get-infinite-robux_GM431946152.pdf
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/free-robux-hack-no-human-verification-or-survey_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002dc2.bin
bf9ce217f1f34253f81c1dbffa70a83599b265658948cdeb2e3cefa72fedc512		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2DC2 21668 bytes
font_01_sfnt_off00005d59.bin
bea12f5c1905fe5d1ca5acd369b45985eddae9fbbbe34fc32947a46404ebe472		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D59 18932 bytes

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