Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2bd765637301e03…

MALICIOUS

PDF

40.9 KB Created: 2021-05-19 03:10:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 068dffd9479157ff045cb4619e79442f SHA-1: 15a44da9d63852e27ff31273ed381505dd2be322 SHA-256: e2bd765637301e030d5a08989d6743d60500970097ea979d9b3e1e93633a2684
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of external links, many of which are SEO-optimized and point to other PDF files, suggesting a link farm or content-loading mechanism. The document body mentions "Master Coin Hack App" and includes a URL that likely leads to a download. The presence of numerous links and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content or applications.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/406889139/master-coin-hack-app-game-hack
    • http://installer-m.ru/images/coin-master-app-for-free-spins_GM406889139.pdf
    • http://installer-m.ru/images/coin-master-hack-2021-app-download_GM406889139.pdf
    • http://installer-m.ru/images/update-coin-master-free-spins_GM406889139.pdf
    • http://installer-m.ru/images/coin-master-game-free-play-online_GM406889139.pdf
    • http://installer-m.ru/images/how-to-get-free-minecoins-in-minecraft_GM479516143.pdf
    • http://installer-m.ru/images/coin-master-free-spins-link-download-today_GM406889139.pdf
    • http://installer-m.ru/images/coin-master-free-spins-link-blogspot-april-2021_GM406889139.pdf
    • http://installer-m.ru/images/coin-master-daily-free-coins-link_GM406889139.pdf
    • http://installer-m.ru/images/hey-google-how-do-you-get-free-robux_GM431946152.pdf
    • http://installer-m.ru/images/coinmaster-twitter_GM406889139.pdf
    • http://installer-m.ru/images/heroes-online-roblox_GM431946152.pdf
    • http://installer-m.ru/images/coin-master-free-spin-link-app_GM406889139.pdf
    • http://installer-m.ru/images/kachifpro_GM406889139.pdf
    • http://installer-m.ru/images/codes-how-to-get-free-robux_GM431946152.pdf
    • http://installer-m.ru/images/rbx-robux_GM431946152.pdf
    • http://installer-m.ru/images/minecraft-skins-download-free_GM479516143.pdf
    • http://installer-m.ru/images/coin-master-free-100-spin-link_GM406889139.pdf
    • http://installer-m.ru/images/coin-master-hack-download-android_GM406889139.pdf
    • http://installer-m.ru/images/free-roblox-hair-codes_GM431946152.pdf
    • http://installer-m.ru/images/free-coin-master-spins-and-coins-for-daily_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000045bd.bin
d905ac825540231242499a2587bd7d1a7f0afeb3d4f40271a05d05584186d2d5
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x45BD 25264 bytes
font_01_sfnt_off00007e8b.bin
41282dcb1c000e988ea8b2199b00347d54e117e16c55148ab4165d720f01bc1d
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E8B 17892 bytes