Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bab4b0778f052a8…

MALICIOUS

PDF

34.8 KB Created: 2021-07-04 08:22:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 1c6daafff336cbc7924ff4f37069a765 SHA-1: 8c494bdd9c2832a6528110a7af120f0b8510e10b SHA-256: 2bab4b0778f052a83d7b0996f741bdf5193fb756e3acc0c913766653089f19aa
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are hosted on domains related to game hacks and free virtual currency. The document body explicitly mentions 'Free Robux Gift Card' and includes URLs that directly lead to such content, indicating a phishing or scam attempt. The presence of a large number of external links and the ML classifier's high confidence score support this assessment.

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/free-robux-gift-card-game-hack
    • https://www.summerland.com.tw/upload/files/coin-master-34-4-hack_GM406889139.pdf
    • https://www.summerland.com.tw/upload/files/how-to-get-everything-free-on-roblox_GM431946152.pdf
    • https://www.summerland.com.tw/upload/files/free-robux-codes-2021-not-used_GM431946152.pdf
    • https://www.summerland.com.tw/upload/files/roblox-free-adidas-tenue_GM431946152.pdf
    • https://www.summerland.com.tw/upload/files/roblox-mad-city-hack-rank-april_GM431946152.pdf
    • https://www.summerland.com.tw/upload/files/if-sombody-cheats-in-roblox-what-do-you-do_GM431946152.pdf
    • https://www.summerland.com.tw/upload/files/how-to-earn-robux_GM431946152.pdf
    • https://www.summerland.com.tw/upload/files/hide-and-seek-extreme-roblox-hack_GM431946152.pdf
    • https://www.summerland.com.tw/upload/files/free-robux-no-human-verification-on-ipad_GM431946152.pdf
    • https://www.summerland.com.tw/upload/files/how-to-hack-on-roblox-murder_GM431946152.pdf
    • https://www.summerland.com.tw/upload/files/check-cashed-v3-beta-free-download-roblox_GM431946152.pdf
    • https://www.summerland.com.tw/upload/files/roblox-can-moderators-get-free-robux_GM431946152.pdf
    • https://www.summerland.com.tw/upload/files/roblox-free-play-at-school_GM431946152.pdf
    • https://www.summerland.com.tw/upload/files/the-crew-cheats-at-roblox_GM431946152.pdf
    • https://www.summerland.com.tw/upload/files/coin-master-spin-hack-no-human-verification_GM406889139.pdf
    • https://www.summerland.com.tw/upload/files/free-robux-images_GM431946152.pdf
    • https://www.summerland.com.tw/upload/files/how-to-get-free-robux-without-downloading-app_GM431946152.pdf
    • https://www.summerland.com.tw/upload/files/free-robux-codes-2021_GM431946152.pdf
    • https://www.summerland.com.tw/upload/files/roblox-svg-free_GM431946152.pdf
    • https://www.summerland.com.tw/upload/files/seraph-roblox-free_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000309b.bin
1c7caf23922c41c66a5a66f8a5247dce950c9e7aca059c4447c39a2e03fa6b0e
pdf-font-stream PDF embedded font (sfnt) at offset 0x309B 22580 bytes
font_01_sfnt_off000062da.bin
5d60391c622a458b14b8fa69ffb952c1d3cbb56e74fa158a34f16b9612198a82
pdf-font-stream PDF embedded font (sfnt) at offset 0x62DA 19112 bytes