Malicious PDF — malware analysis report

Static analysis result for SHA-256 75e02c7a2aef4329…

MALICIOUS

PDF

32.6 KB Created: 2021-06-27 02:47:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 889b27270a70b65ca1f80cc8e2d1f3cc SHA-1: a9b57e7ab35457c90afc4a6da25f5d074cfbdd74 SHA-256: 75e02c7a2aef4329580580f93c53a8c7c6e4fab79641b1fbe5e0a9e53f088dae
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous links to external websites, many of which are hosted on cow-style.com.tw and netcdn.co, promoting game hacks and cheats for popular games like Roblox and Coin Master. The presence of a large number of external links and the ML classifier flagging this PDF as malicious strongly suggest a malicious intent to redirect users to potentially harmful content or downloads.

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/roblox-free-draw-hack-game-hack
    • https://www.cow-style.com.tw/upload/files/free-robux-apps-for-window-only_GM431946152.pdf
    • https://www.cow-style.com.tw/upload/files/hack-roblox-workin-the-fuck_GM431946152.pdf
    • https://www.cow-style.com.tw/upload/files/coin-master-card-collection-hack-apk_GM406889139.pdf
    • https://www.cow-style.com.tw/upload/files/roblox-hack-deutsch-auf-pc_GM431946152.pdf
    • https://www.cow-style.com.tw/upload/files/how-to-get-free-robux-no-human-verification_GM431946152.pdf
    • https://www.cow-style.com.tw/upload/files/minecraft-pocket-edition-free-apk_GM479516143.pdf
    • https://www.cow-style.com.tw/upload/files/coin-master-hack-without-verification-code_GM406889139.pdf
    • https://www.cow-style.com.tw/upload/files/coin-master-sound-daily-free-spins-link-today_GM406889139.pdf
    • https://www.cow-style.com.tw/upload/files/get-free-robux-pastebin_GM431946152.pdf
    • https://www.cow-style.com.tw/upload/files/free-robux-hacks-no-verification_GM431946152.pdf
    • https://www.cow-style.com.tw/upload/files/coin-master-homepage_GM406889139.pdf
    • https://www.cow-style.com.tw/upload/files/free-coins-and-spins-for-coin-master_GM406889139.pdf
    • https://www.cow-style.com.tw/upload/files/free-robux-games-that-actually-work_GM431946152.pdf
    • https://www.cow-style.com.tw/upload/files/hack-to-get-free-spins-on-coin-master_GM406889139.pdf
    • https://www.cow-style.com.tw/upload/files/free-spins-and-coins-from-coin-master-game_GM406889139.pdf
    • https://www.cow-style.com.tw/upload/files/aimbot-exe-roblox_GM431946152.pdf
    • https://www.cow-style.com.tw/upload/files/earn-rbx_GM431946152.pdf
    • https://www.cow-style.com.tw/upload/files/free-robux-pastebin-2021_GM431946152.pdf
    • https://www.cow-style.com.tw/upload/files/free-btools-roblox_GM431946152.pdf
    • https://www.cow-style.com.tw/upload/files/fre-roblox-gift-code_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002c7c.bin
7e624656ec77a7c8798785289952d79bb8ae6dd662a6c491dc013daf1b6ce350
pdf-font-stream PDF embedded font (sfnt) at offset 0x2C7C 20960 bytes
font_01_sfnt_off000059ff.bin
6d1ecb747049e980c7455394c80d5f4d8a819dbf924198221c44cb4088e29b5a
pdf-font-stream PDF embedded font (sfnt) at offset 0x59FF 19152 bytes