Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bd7896c96016d90…

MALICIOUS

PDF

35.0 KB Created: 2021-07-05 08:14:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 5d9d2a8581100adcf544be664bfd1d0b SHA-1: 6a9e9f0679013f9256aa841948e28d32c73a9ff2 SHA-256: 7bd7896c96016d9093519d3e6ff45b6d79795110ab8ca4995d64a3f2d14e0670
102 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources, many of which are presented as 'hacks' or 'free coins' for games like Coin Master and Roblox. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of such links, suggesting a tactic to drive traffic to potentially malicious download sites. The ML classifier also strongly flagged this PDF as malicious.

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/coin-master-free-coins-app-game-hack
    • http://elearning.mtsn12madiun.sch.id/__statics/gudangsoal/files/cheat-engine-roblox-mad-city_GM431946152.pdf
    • https://elearning.mtsn12madiun.sch.id/__statics/gudangsoal/files/dragon-ball-final-stand-roblox-hack_GM431946152.pdf
    • https://elearning.mtsn12madiun.sch.id/__statics/gudangsoal/files/roblox-snow-shoveling-simulator-hack_GM431946152.pdf
    • https://elearning.mtsn12madiun.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-for-free-on-pc_GM479516143.pdf
    • https://elearning.mtsn12madiun.sch.id/__statics/gudangsoal/files/roblox-adopt-me-hack_GM431946152.pdf
    • https://elearning.mtsn12madiun.sch.id/__statics/gudangsoal/files/free-coins-coin-master_GM406889139.pdf
    • http://elearning.mtsn12madiun.sch.id/__statics/gudangsoal/files/free-spins-for-coin-master-app_GM406889139.pdf
    • https://elearning.mtsn12madiun.sch.id/__statics/gudangsoal/files/coin-master-free-spin-sites_GM406889139.pdf
    • https://elearning.mtsn12madiun.sch.id/__statics/gudangsoal/files/exploit-hack-download-roblox_GM431946152.pdf
    • https://elearning.mtsn12madiun.sch.id/__statics/gudangsoal/files/roblox-studio-free_GM431946152.pdf
    • https://elearning.mtsn12madiun.sch.id/__statics/gudangsoal/files/free-minecraft-bedrock-server-hosting-24-7_GM479516143.pdf
    • http://elearning.mtsn12madiun.sch.id/__statics/gudangsoal/files/free-robux-laptop_GM431946152.pdf
    • https://elearning.mtsn12madiun.sch.id/__statics/gudangsoal/files/robux-claimer_GM431946152.pdf
    • http://elearning.mtsn12madiun.sch.id/__statics/gudangsoal/files/download-hack-roblox-jailbreak-money_GM431946152.pdf
    • https://elearning.mtsn12madiun.sch.id/__statics/gudangsoal/files/how-to-get-free-coins-for-coin-master_GM406889139.pdf
    • http://elearning.mtsn12madiun.sch.id/__statics/gudangsoal/files/minecraft-windows-10-edition-free-with-java_GM479516143.pdf
    • http://elearning.mtsn12madiun.sch.id/__statics/gudangsoal/files/roblox-free-hats-catalog_GM431946152.pdf
    • http://elearning.mtsn12madiun.sch.id/__statics/gudangsoal/files/roblox-egg-farm-simulator-comment-obtenir-des-oeufs-noirs-cheat_GM431946152.pdf
    • http://elearning.mtsn12madiun.sch.id/__statics/gudangsoal/files/inappropriate-roblox-games_GM431946152.pdf
    • http://elearning.mtsn12madiun.sch.id/__statics/gudangsoal/files/how-to-hack-someones-account-on-roblox-2021-jax_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000353c.bin
298e918a7a8e892391c7fea35627b6c53f6b0e6da8e4cb32cd67e62550a6e061		 pdf-font-stream PDF embedded font (sfnt) at offset 0x353C 22148 bytes
font_01_sfnt_off00006656.bin
78fd92e643045a663d15c45c74126e1d779604aea3e1437bd5d883e9616c0973		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6656 18176 bytes

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