Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d263964bf45c6e5…

MALICIOUS

PDF

41.8 KB Created: 2021-05-17 07:35:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: ca6ef2b2c96950a5d0cabdb574763032 SHA-1: c2d884060aa3492cf4de5a77c07db92a88bade8a SHA-256: 9d263964bf45c6e5aced2339f22e023f863948d26d7cd7786347b89b0ba703f5
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of external links, many of which point to other PDF files, suggesting a link farm designed to attract traffic. The document body and extracted URLs indicate a lure related to game hacks and cheats, aiming to trick users into downloading malicious content. The presence of a password archive lure suggests an attempt to bypass security scanning by encrypting the actual payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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 https://netcdn.xyz/app/431946152/strucid-aimbot-game-hack
    • http://www.copoint.co.uk/images/how-to-use-redstone_GM479516143.pdf
    • http://www.copoint.co.uk/images/how-to-get-free-minecraft-skins_GM479516143.pdf
    • http://www.copoint.co.uk/images/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdf
    • http://www.copoint.co.uk/images/how-to-duplicate-coin-master-spin-hack_GM406889139.pdf
    • http://www.copoint.co.uk/images/lazy-blocks-com-free-robux_GM431946152.pdf
    • http://www.copoint.co.uk/images/how-to-get-free-robux-instantly_GM431946152.pdf
    • http://www.copoint.co.uk/images/coin-master-promo-code-2021_GM406889139.pdf
    • http://www.copoint.co.uk/images/coin-master-daily-free-coins-link-today_GM406889139.pdf
    • http://www.copoint.co.uk/images/roblox-assassin_GM431946152.pdf
    • http://www.copoint.co.uk/images/minecraft-thumbnail-maker-free_GM479516143.pdf
    • http://www.copoint.co.uk/images/robux-free-com_GM431946152.pdf
    • http://www.copoint.co.uk/images/can-i-play-minecraft-for-free_GM479516143.pdf
    • http://www.copoint.co.uk/images/coin-master-free-spins-hack-apk-download_GM406889139.pdf
    • http://www.copoint.co.uk/images/free-spins-coin-master-links-no-human-verification_GM406889139.pdf
    • http://www.copoint.co.uk/images/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdf
    • http://www.copoint.co.uk/images/minecraft-hacks-for-2b2t_GM479516143.pdf
    • http://www.copoint.co.uk/images/free-minecraft-maps-pe_GM479516143.pdf
    • http://www.copoint.co.uk/images/free-robux-2021-no-human-verification_GM431946152.pdf
    • http://www.copoint.co.uk/images/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdf
    • http://www.copoint.co.uk/images/roblox-help-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004752.bin
514f0e86214361ecc01c979b4a2b6d73aa1f561669ebd989b22adccf37cc9ec1
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4752 25632 bytes
font_01_sfnt_off0000811a.bin
5e76754d7c88df49b426088ed5724e1b633068c8c381957419361bbc1c60a3f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x811A 18296 bytes