Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a3029233eaeb115…

MALICIOUS

PDF

32.9 KB Created: 2021-07-05 19:02:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: e44a1b84d8caacdc079615bce3f758fb SHA-1: da7decdf4248cfa9015cdaff5a7281334bd2594d SHA-256: 1a3029233eaeb115c7b23c4e5cfff786e124af48da5449fc96686cd6acd9c95e
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a large number of embedded URLs, many of which are structured as a link farm for game-related cheats and hacks. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external PDF links, suggesting a tactic to drive traffic to potentially malicious download sites. The ML classifier also strongly flagged this PDF as malicious, supporting the assessment that it is designed to trick users into downloading harmful content.

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/431946152/rbxdemon-game-hack
    • http://stitqi.ac.id/website//repository/roblox-place-rewards_GM431946152.pdf
    • http://stitqi.ac.id/website/repository/coin-master-free-spins-daily-link-updated_GM406889139.pdf
    • http://stitqi.ac.id/website/repository/free-robux-codes-no-verification_GM431946152.pdf
    • http://stitqi.ac.id/website//repository/free-spins-coin-master-hack_GM406889139.pdf
    • http://stitqi.ac.id/website/repository/robux-premium_GM431946152.pdf
    • http://stitqi.ac.id/website//repository/how-to-hack-coin-master-2021_GM406889139.pdf
    • http://stitqi.ac.id/website//repository/how-to-get-free-shields-on-coin-master_GM406889139.pdf
    • http://stitqi.ac.id/website//repository/minecraft-bedrock-edition-pc-download-free_GM479516143.pdf
    • http://stitqi.ac.id/website/repository/free-robux-picture_GM431946152.pdf
    • http://stitqi.ac.id/website/repository/coin-master-ids-for-free-spins_GM406889139.pdf
    • http://stitqi.ac.id/website//repository/coinmaster-hack_GM406889139.pdf
    • http://stitqi.ac.id/website/repository/roblox-hack-no-human-verification-2021-no-survey_GM431946152.pdf
    • http://stitqi.ac.id/website/repository/coin-master-hacks-2021_GM406889139.pdf
    • http://stitqi.ac.id/website//repository/coin-master-hack-tool-v1-9_GM406889139.pdf
    • http://stitqi.ac.id/website//repository/coin-master-hack-apk-link_GM406889139.pdf
    • http://stitqi.ac.id/website//repository/free-robux-groups-2021_GM431946152.pdf
    • http://stitqi.ac.id/website/repository/free-roblox-codes_GM431946152.pdf
    • http://stitqi.ac.id/website/repository/how-to-get-hacked-accounts-back-on-roblox_GM431946152.pdf
    • http://stitqi.ac.id/website//repository/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdf
    • http://stitqi.ac.id/website//repository/plug-toolbox-for-minecraft-free-ios_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002bda.bin
3dc7a2a1e921978afc81e910b015655dd29ccf2da5adca7cfb725bba0fc6112b
pdf-font-stream PDF embedded font (sfnt) at offset 0x2BDA 21904 bytes
font_01_sfnt_off00005bd4.bin
c8a2595e802ed22d3f92a782be696ae3de60702987379a605de61e4dc59e7030
pdf-font-stream PDF embedded font (sfnt) at offset 0x5BD4 18848 bytes