Malicious PDF — malware analysis report

Static analysis result for SHA-256 003738c9d1feadcf…

MALICIOUS

PDF

34.2 KB Created: 2021-07-01 19:39:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 5b2b8c1638adbd1458c39480e4823667 SHA-1: bec28de5351ece8f222217be80b9915784b2c214 SHA-256: 003738c9d1feadcfb18c42949227591bbcc135dcd2e6869d96d093e4857f0a14
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains numerous links to external websites, many of which are SEO-optimized pages designed to lure users into downloading malicious content related to popular games. The presence of a direct download URL and a high ML classifier score indicates a strong likelihood of malicious intent. The document's structure suggests it is part of a phishing or scam campaign aiming to distribute malware.

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/exploit-hack-roblox-jailbreak-game-hack
    • https://yeushuen.com.tw/image/data/files/free-roblox-gift-card-codes-2021_GM431946152.pdf
    • https://yeushuen.com.tw/image/data/files/report-abuse-robox-paist-bin-free-robux-code_GM431946152.pdf
    • https://yeushuen.com.tw/image/data/files/get-a-roblox-account-wiyh-robux-free_GM431946152.pdf
    • https://yeushuen.com.tw/image/data/files/how-to-get-free-robux-inspect-2021_GM431946152.pdf
    • https://yeushuen.com.tw/image/data/files/how-to-get-free-robux-without-downloading-anything_GM431946152.pdf
    • https://yeushuen.com.tw/image/data/files/roblox-studio-free-robux_GM431946152.pdf
    • https://yeushuen.com.tw/image/data/files/roblox-hacks-2021-may-20_GM431946152.pdf
    • https://yeushuen.com.tw/image/data/files/how-to-get-free-spins-on-coin-master-hack_GM406889139.pdf
    • https://yeushuen.com.tw/image/data/files/spin-free-coin-master_GM406889139.pdf
    • https://yeushuen.com.tw/image/data/files/free-coin-master-androd-cheats-2021_GM406889139.pdf
    • https://yeushuen.com.tw/image/data/files/coin-master-free-cards-hack_GM406889139.pdf
    • https://yeushuen.com.tw/image/data/files/how-to-create-gui-roblox-hack_GM431946152.pdf
    • https://yeushuen.com.tw/image/data/files/roblox-hack-or-exploit_GM431946152.pdf
    • https://yeushuen.com.tw/image/data/files/roblox-com-hack_GM431946152.pdf
    • https://yeushuen.com.tw/image/data/files/coin-master-free-spins-link-today-haktuts_GM406889139.pdf
    • https://yeushuen.com.tw/image/data/files/free-coin-master-hacks-no-verification_GM406889139.pdf
    • https://yeushuen.com.tw/image/data/files/coin-master-hack-facebook_GM406889139.pdf
    • https://yeushuen.com.tw/image/data/files/roblox-can-you-upload-shirts-for-free_GM431946152.pdf
    • https://yeushuen.com.tw/image/data/files/how-to-get-free-valk-roblox_GM431946152.pdf
    • https://yeushuen.com.tw/image/data/files/roblox-games-with-free-vip-servers_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002ee0.bin
7e98b36ed3f1fbcb0930e10c34f6c3c64993cc31c01b8ab7ed56751484c9a823
pdf-font-stream PDF embedded font (sfnt) at offset 0x2EE0 22176 bytes
font_01_sfnt_off0000601d.bin
1177755d0e41a0f679baca4d1bf12ac6a47187b6bd8f25bb722d6a3336e229f4
pdf-font-stream PDF embedded font (sfnt) at offset 0x601D 19224 bytes