Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a6fe41d8457f615…

MALICIOUS

PDF

34.1 KB Created: 2021-07-10 00:01:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: f1665db7df46557615474c7b0c97428c SHA-1: c55b173e4ee4c5653fb39616b039fcff24beeaf1 SHA-256: 4a6fe41d8457f615e4b2adea61ba4783558ff52ef97a55ae50f6639542bce732
102 Risk Score

Malware Insights

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

The PDF document contains numerous links to external websites, many of which are disguised as downloads for popular games and applications. The presence of a "PDF_SEO_LINK_FARM" heuristic firing and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content. The document body explicitly mentions "Coin Master Hack Pc Free" and includes URLs that reinforce this theme, suggesting a scam or malware distribution lure.

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-hack-pc-free-game-hack
    • http://mbbs.hr/files/minecraft-bedrock-edition-free-with-java_GM479516143.pdf
    • https://mbbs.hr/files/roblox-ultimate-driving-2-westover-islands-free-job_GM431946152.pdf
    • http://mbbs.hr/files/daily-coin-master-free-spin-link_GM406889139.pdf
    • http://mbbs.hr/files/free-robux-just-enter-username-and-password_GM431946152.pdf
    • https://mbbs.hr/files/roblox-free-robux-hack_GM431946152.pdf
    • http://mbbs.hr/files/mangocheats-com-hack-coin-master-cheat_GM406889139.pdf
    • https://mbbs.hr/files/tiktok-free-view-iphone-wallpaper_GM835599320.pdf
    • http://mbbs.hr/files/how-to-get-free-coins-and-spins-on-coin-master_GM406889139.pdf
    • http://mbbs.hr/files/minecraft-java-free-download_GM479516143.pdf
    • http://mbbs.hr/files/freespinandcoinblogspot-com-2021-11-coinmasterfreespins_GM406889139.pdf
    • http://mbbs.hr/files/how-do-you-get-free-robux-on-roblox_GM431946152.pdf
    • http://mbbs.hr/files/can-you-actually-get-free-robux_GM431946152.pdf
    • http://mbbs.hr/files/roblox-download-pc-free_GM431946152.pdf
    • https://mbbs.hr/files/roblox-hack-no-survey-no-download-no-human-verification_GM431946152.pdf
    • http://mbbs.hr/files/roblox-robux-hack_GM431946152.pdf
    • http://mbbs.hr/files/how-to-hack-reason-2-die-on-roblox_GM431946152.pdf
    • http://mbbs.hr/files/free-robux-pastebin_GM431946152.pdf
    • https://mbbs.hr/files/minecraft-build-hacks_GM479516143.pdf
    • http://mbbs.hr/files/roblox-hack-retail-tycoon_GM431946152.pdf
    • http://mbbs.hr/files/minecraft-hacked-client-download_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f5f.bin
0973d3d73b6df67423c8beaffd5a2acd0a34ee7dedf4c5003581e1cdc4ebbd05
pdf-font-stream PDF embedded font (sfnt) at offset 0x2F5F 22832 bytes
font_01_sfnt_off0000627d.bin
ebf0321ec6e8ffc49fe61d07e61addb17e9f8bf230c91511302a62cf4f93e440
pdf-font-stream PDF embedded font (sfnt) at offset 0x627D 18320 bytes