Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fa63056a59797e9…

MALICIOUS

PDF

34.2 KB Created: 2021-07-04 02:23:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 62feba37258d5524ec559cc91e91cc8e SHA-1: ffc6c598ef1525415a8fa73496d6dd0c3b505595 SHA-256: 9fa63056a59797e976616c2b5825e341c305b40a07b929fc8a2ded284eb328fd
122 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many pointing to IP addresses, designed to trick users into downloading files presented as game hacks or cheats. The ML classifier strongly indicated maliciousness, and the PDF structure suggests a link farm designed for SEO poisoning to attract users searching for cheats. The document body contains obfuscated text and URLs related to popular games, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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/coinmasterfree-game-hack
    • http://36.94.36.7/elib/repository/minecraft-free-download-iphone_GM479516143.pdf
    • http://36.94.36.7/elib//repository/free-robux-without-verification-or-survey_GM431946152.pdf
    • http://36.94.36.7/elib//repository/coin-master-daily-free-spins-link-today-facebook_GM406889139.pdf
    • http://36.94.36.7/elib/repository/how-do-u-get-free-robux-on-mobile_GM431946152.pdf
    • http://36.94.36.7/elib/repository/bloxawards-com-earn-free-robux_GM431946152.pdf
    • http://36.94.36.7/elib/repository/how-to-hack-on-roblox-into-accounts_GM431946152.pdf
    • http://36.94.36.7/elib//repository/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdf
    • http://36.94.36.7/elib/repository/how-to-get-titan-hacks-in-roblox_GM431946152.pdf
    • http://36.94.36.7/elib//repository/free-robux-obby-2021_GM431946152.pdf
    • http://36.94.36.7/elib/repository/how-to-get-free-hats-on-roblox_GM431946152.pdf
    • http://36.94.36.7/elib//repository/coin-master-free-coins-link-blogspot_GM406889139.pdf
    • http://36.94.36.7/elib/repository/free-coin-master-spins-link_GM406889139.pdf
    • http://36.94.36.7/elib/repository/coin-master-hack-mod-apk-unlimited-spins_GM406889139.pdf
    • http://36.94.36.7/elib//repository/coin-master-daily-rewards-link_GM406889139.pdf
    • http://36.94.36.7/elib//repository/hack-coin-master-spin-apk_GM406889139.pdf
    • http://36.94.36.7/elib/repository/how-to-get-minecraft-bedrock-for-free-with-java_GM479516143.pdf
    • http://36.94.36.7/elib//repository/how-to-get-free-daily-spins-on-coin-master_GM406889139.pdf
    • http://36.94.36.7/elib//repository/coin-master-apk-hack-358_GM406889139.pdf
    • http://36.94.36.7/elib/repository/roblox-bux-free_GM431946152.pdf
    • http://36.94.36.7/elib//repository/how-to-get-free-roblox-items_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000032bd.bin
b64a760f84e5dc7695b607dabe3d00c0d9e06fce4142d52a5d0acdf98129dffb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x32BD 22124 bytes
font_01_sfnt_off000063c2.bin
e3b824c700fc1afb9be61c0fda879df8bb3fefe3698910b387f7b25b5267b414		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63C2 18092 bytes

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