Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8c3ab5881a9ae1a…

MALICIOUS

PDF

33.2 KB Created: 2021-07-09 00:10:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 57d112109110bc71fdc8eafe1185a965 SHA-1: ae1605b33508d266bd4bbf886026bbb7f075153c SHA-256: e8c3ab5881a9ae1a8d21df62d5e706f35cbe555b3425327a2708d679c975ae20
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a document body that promotes free in-game currency and cheats for popular games like Coin Master and Roblox. The heuristic PDF_SEO_LINK_FARM indicates a large number of external links, suggesting a link farm or redirection scheme. The ML_NYX_PDF_MALICIOUS firing further supports the malicious nature of the document, likely intended to lead users to phishing or scam sites.

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/free-coin-master-coins-and-spins-game-hack
    • http://bepquannhu.vn/upload/editor/files/coin-master-3rd-village-free-2021-gift-card_GM406889139.pdf
    • http://bepquannhu.vn/upload/editor/files/coin-master-cheats-2021_GM406889139.pdf
    • http://bepquannhu.vn/upload/editor/files/free-tiktok-views-no-verification_GM835599320.pdf
    • http://bepquannhu.vn/upload/editor/files/roblox-bubble-gum-simulator-hack_GM431946152.pdf
    • http://bepquannhu.vn/upload/editor/files/how-to-get-free-coins-on-roblox_GM431946152.pdf
    • http://bepquannhu.vn/upload/editor/files/hack-coin-master-for-free_GM406889139.pdf
    • http://bepquannhu.vn/upload/editor/files/free-robux-generator-no-human-verification_GM431946152.pdf
    • http://bepquannhu.vn/upload/editor/files/free-gift-card-roblox-codes-2021-list_GM431946152.pdf
    • http://bepquannhu.vn/upload/editor/files/discord-free-robux-bot_GM431946152.pdf
    • http://bepquannhu.vn/upload/editor/files/level-6-hack-roblox_GM431946152.pdf
    • http://bepquannhu.vn/upload/editor/files/nograv-on-roblox-using-cheat-engine_GM431946152.pdf
    • http://bepquannhu.vn/upload/editor/files/roblox-com-free-robux_GM431946152.pdf
    • http://bepquannhu.vn/upload/editor/files/coin-master-hack-apk-iphone_GM406889139.pdf
    • http://bepquannhu.vn/upload/editor/files/minecraft-for-free-on-phone_GM479516143.pdf
    • http://bepquannhu.vn/upload/editor/files/roblox-robux-hack-download-2021_GM431946152.pdf
    • http://bepquannhu.vn/upload/editor/files/how-to-hack-roblox-hax_GM431946152.pdf
    • http://bepquannhu.vn/upload/editor/files/roblox-free-clothes-codes_GM431946152.pdf
    • http://bepquannhu.vn/upload/editor/files/slurp-ink-roblox-hack_GM431946152.pdf
    • http://bepquannhu.vn/upload/editor/files/coin-master-daily-free-spins-link-facebook_GM406889139.pdf
    • http://bepquannhu.vn/upload/editor/files/hack-de-dinero-para-jailbreak-roblox_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002cff.bin
148599896282be8664cd68176fd8a4a9f614e189dc99e4c8a732814ccb1141e6
pdf-font-stream PDF embedded font (sfnt) at offset 0x2CFF 22344 bytes
font_01_sfnt_off00005eb1.bin
cc12283f691ecd9c6c4381c5355a15c3235cfa1ea9601b68c1f91d3883d88a7b
pdf-font-stream PDF embedded font (sfnt) at offset 0x5EB1 18348 bytes