Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb0097da7e2ca431…

MALICIOUS

PDF

32.7 KB Created: 2021-07-03 12:42:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: d593e4cc07d256a53b8d85be1d94d8ff SHA-1: 83a63c5dbbfc2ec5d95ebd760e6ea0568f7a3a4b SHA-256: eb0097da7e2ca4318a09f13783209d43de91527ca32c9ddac6fe98094b187fab
102 Risk Score

Malware Insights

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

The PDF document contains numerous links, including one to 'netcdn.tw/app/431946152/free-roblox-toys-game-hack', and exhibits characteristics of a link farm designed to attract users with promises of free game items. The ML classifier strongly flagged this PDF as malicious, and the presence of a large number of external links further supports a malicious intent, likely to redirect users to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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-roblox-toys-game-hack
    • https://cnc-xinrong.com.tw/image/data/files/how-to-get-free-robuxs-by-surveys_GM431946152.pdf
    • https://cnc-xinrong.com.tw/image/data/files/free-1-hundred-robux_GM431946152.pdf
    • https://cnc-xinrong.com.tw/image/data/files/lohith-gaming-how-to-get-free-robux_GM431946152.pdf
    • https://cnc-xinrong.com.tw/image/data/files/how-to-hack-roblox-in-1-min_GM431946152.pdf
    • https://cnc-xinrong.com.tw/image/data/files/robux-free-promo-codes_GM431946152.pdf
    • https://cnc-xinrong.com.tw/image/data/files/free-now-for-free-robux_GM431946152.pdf
    • https://cnc-xinrong.com.tw/image/data/files/free-robux-for-downloading-apps_GM431946152.pdf
    • https://cnc-xinrong.com.tw/image/data/files/huskybuckscom-free-robux_GM431946152.pdf
    • https://cnc-xinrong.com.tw/image/data/files/roblox-how-to-use-cheat-engine-2021_GM431946152.pdf
    • https://cnc-xinrong.com.tw/image/data/files/can-you-get-free-robux-on-roblox_GM431946152.pdf
    • https://cnc-xinrong.com.tw/image/data/files/robuxmatch-com-free-robux_GM431946152.pdf
    • https://cnc-xinrong.com.tw/image/data/files/coin-master-new-link-free-spin_GM406889139.pdf
    • https://cnc-xinrong.com.tw/image/data/files/free-robux-websites-that-actually-work_GM431946152.pdf
    • https://cnc-xinrong.com.tw/image/data/files/how-to-get-minecraft-for-free-on-chromebook_GM479516143.pdf
    • https://cnc-xinrong.com.tw/image/data/files/how-to-hack-roblox-on-mobile_GM431946152.pdf
    • https://cnc-xinrong.com.tw/image/data/files/how-to-get-free-robux-hack_GM431946152.pdf
    • https://cnc-xinrong.com.tw/image/data/files/como-hackear-a-un-amigo-en-roblox_GM431946152.pdf
    • https://cnc-xinrong.com.tw/image/data/files/pixies-gigantic-coin-master-free-spins-and-coins_GM406889139.pdf
    • https://cnc-xinrong.com.tw/image/data/files/cheat-pour-phantom-force-roblox_GM431946152.pdf
    • https://cnc-xinrong.com.tw/image/data/files/free-robux-no-apps_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002ab8.bin
64a1d8f66c5374b3c2f66f0088696cb51b2a835c79288d54008dc993301f0554
pdf-font-stream PDF embedded font (sfnt) at offset 0x2AB8 22072 bytes
font_01_sfnt_off00005b88.bin
0ae16075fab88340abf3ae58f1c231bf26e12fe3956ddb751496fa7b825c2438
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B88 18828 bytes