Malicious PDF — malware analysis report

Static analysis result for SHA-256 712702ad0ef50fea…

MALICIOUS

PDF

35.1 KB Created: 2021-07-05 09:22:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 07cebd16c1596feda1348e3282a03210 SHA-1: 6c997e8512793a22362b0c7b70a4db82436444b5 SHA-256: 712702ad0ef50fea97e76c96f53c1d89f523e0b51a8681b71c00b6c19a8422ef
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, many of which point to resources related to free in-game items and hacks for popular games like Roblox. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm or redirection scheme. The primary URL 'http://netcdn.tw/app/406889139/todays-free-spin-and-coin-links-game-hack' is likely the initial lure, potentially leading to a scam or a download of a second-stage payload.

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/406889139/todays-free-spin-and-coin-links-game-hack
    • https://tpp.com.tw/image/data/files/everythings-free-roblox-mm2-uncopylocked_GM431946152.pdf
    • https://tpp.com.tw/image/data/files/how-can-u-get-free-robux_GM431946152.pdf
    • https://tpp.com.tw/image/data/files/minecraft-windows-10-free-trial_GM479516143.pdf
    • https://tpp.com.tw/image/data/files/roblox-hack-item-free_GM431946152.pdf
    • https://tpp.com.tw/image/data/files/how-to-get-free-robuxs-by-surveys_GM431946152.pdf
    • https://tpp.com.tw/image/data/files/free-roblox-avatar_GM431946152.pdf
    • https://tpp.com.tw/image/data/files/roblox-robux-generator-no-human-verification_GM431946152.pdf
    • https://tpp.com.tw/image/data/files/how-to-hack-another-player-on-roblox-not-working_GM431946152.pdf
    • https://tpp.com.tw/image/data/files/comment-hacker-robloxe_GM431946152.pdf
    • https://tpp.com.tw/image/data/files/how-to-get-free-robux-without-offers_GM431946152.pdf
    • https://tpp.com.tw/image/data/files/roblox-abs-t-shirt-free_GM431946152.pdf
    • https://tpp.com.tw/image/data/files/coin-master-hack-ios-download_GM406889139.pdf
    • https://tpp.com.tw/image/data/files/free-minecraft-codes_GM479516143.pdf
    • https://tpp.com.tw/image/data/files/how-to-block-someone-on-coin-master_GM406889139.pdf
    • https://tpp.com.tw/image/data/files/how-to-hack-roblox-to-get-robux_GM431946152.pdf
    • https://tpp.com.tw/image/data/files/daily-coin-master-free-spin-link_GM406889139.pdf
    • https://tpp.com.tw/image/data/files/www-bloxland-com-free-robux_GM431946152.pdf
    • https://tpp.com.tw/image/data/files/minecraft-pe-mod-menu_GM479516143.pdf
    • https://tpp.com.tw/image/data/files/how-to-hack-roblox-accounts-for-robux_GM431946152.pdf
    • https://tpp.com.tw/image/data/files/free-roblox-promotion-codes_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003122.bin
22024c3168cb2a5e656200d167838695ec6c5032c47173e4b83ac0e63ab01c38
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3122 23180 bytes
font_01_sfnt_off00006589.bin
d9f470f219aa93d1dfbcbe5b6653e5cda51e656abd72020ea50403cd11ee82f4
pdf-font-stream PDF embedded font (sfnt) at offset 0x6589 18596 bytes