Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b824367fa5aba4b…

MALICIOUS

PDF

35.4 KB Created: 2021-06-20 05:46:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 0cdb5bc59a312cf963a7fc96f3f558b2 SHA-1: 4fd27ede711bdc346f76b5261e4d500601177b2f SHA-256: 2b824367fa5aba4b22fdaa9e245b8c6281a0d46ab5ac06ccfb7709d7b35e01b3
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, identified as a link farm, pointing to external websites. These links are designed to lure users into downloading software related to game cheats and hacks. The ML classifier strongly indicated maliciousness, and the presence of multiple SEO-optimized PDF links suggests a campaign to distribute potentially unwanted or malicious files.

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.co/app/431946152/ultimate-driving-roblox-cheats-game-hack
    • http://bepquannhu.vn/upload/editor/files/free-robux-no-verification-2021_GM431946152.pdf
    • http://bepquannhu.vn/upload/editor/files/free-robux-no-verification-no-download_GM431946152.pdf
    • http://bepquannhu.vn/upload/editor/files/coin-master-pc-game-free-download_GM406889139.pdf
    • http://bepquannhu.vn/upload/editor/files/how-to-get-free-robux-without-downloading-any-apps_GM431946152.pdf
    • http://bepquannhu.vn/upload/editor/files/how-to-hack-roblox-accounts-2021_GM431946152.pdf
    • http://bepquannhu.vn/upload/editor/files/rbxfree-com-free-robux_GM431946152.pdf
    • http://bepquannhu.vn/upload/editor/files/games-like-coin-master-for-free_GM406889139.pdf
    • http://bepquannhu.vn/upload/editor/files/get-free-cards-coin-master_GM406889139.pdf
    • http://bepquannhu.vn/upload/editor/files/coin-master-34-4-hack-download_GM406889139.pdf
    • http://bepquannhu.vn/upload/editor/files/coin-master-hack-xyz-download-free_GM406889139.pdf
    • http://bepquannhu.vn/upload/editor/files/download-minecraft-free-hiapphere_GM479516143.pdf
    • http://bepquannhu.vn/upload/editor/files/how-to-get-minecraft-for-free-ios_GM479516143.pdf
    • http://bepquannhu.vn/upload/editor/files/static-moonactive-net-free-spins_GM406889139.pdf
    • http://bepquannhu.vn/upload/editor/files/how-to-get-free-coins-on-coin-master_GM406889139.pdf
    • http://bepquannhu.vn/upload/editor/files/roblox-games-with-free-radio_GM431946152.pdf
    • http://bepquannhu.vn/upload/editor/files/coin-master-free-spins-bit-ly_GM406889139.pdf
    • http://bepquannhu.vn/upload/editor/files/free-robux-generator-no-verification_GM431946152.pdf
    • http://bepquannhu.vn/upload/editor/files/fireboat-dynamic-ship-simulator-free-roblox_GM431946152.pdf
    • http://bepquannhu.vn/upload/editor/files/coin-master-free-spins-2021-apk_GM406889139.pdf
    • http://bepquannhu.vn/upload/editor/files/free-dominus-roblox-code_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000032a7.bin
86c8b2ee66a1f062a25ccb44104851e68915037e4105a0084fc3f25dd721a8e6
pdf-font-stream PDF embedded font (sfnt) at offset 0x32A7 22492 bytes
font_01_sfnt_off00006443.bin
f5fc050950a2c051141a4aa35b68a0c8bd11a7d10758ac309a610c8ad70f4d37
pdf-font-stream PDF embedded font (sfnt) at offset 0x6443 19416 bytes