Malicious PDF — malware analysis report

Static analysis result for SHA-256 38762cbce4e11a09…

MALICIOUS

PDF

43.8 KB Created: 2021-05-13 04:23:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: ee5882fa7ae3d13f1e8349b15a51af03 SHA-1: 7614c89b210a5f227786709f5aae32cb7fbe09e2 SHA-256: 38762cbce4e11a091b91fcfb9ed7e051f5425670946412f0e119af8a70c13016
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, identified as a link farm, that direct users to external websites. These links are designed to lure users into downloading potentially malicious files, as indicated by the 'roblox-free-online-game-game-hack' URL and the 'PDF_SEO_LINK_FARM' heuristic. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/431946152/roblox-free-online-game-game-hack
    • http://kim-kinder-im-mittelpunkt.de/images/roblox-apk-hack_GM431946152.pdf
    • http://kim-kinder-im-mittelpunkt.de/images/coin-master-mod-version-free-download_GM406889139.pdf
    • http://kim-kinder-im-mittelpunkt.de/images/how-to-hack-roblox-accounts_GM431946152.pdf
    • http://kim-kinder-im-mittelpunkt.de/images/how-to-get-minecraft-for-free-on-xbox_GM479516143.pdf
    • http://kim-kinder-im-mittelpunkt.de/images/can-i-get-free-robux_GM431946152.pdf
    • http://kim-kinder-im-mittelpunkt.de/images/coin-master-get-free-cards_GM406889139.pdf
    • http://kim-kinder-im-mittelpunkt.de/images/free-redeem-code-for-coin-master_GM406889139.pdf
    • http://kim-kinder-im-mittelpunkt.de/images/coin-master-home_GM406889139.pdf
    • http://kim-kinder-im-mittelpunkt.de/images/free-robux-card-codes_GM431946152.pdf
    • http://kim-kinder-im-mittelpunkt.de/images/free-spins-coin-master-apple_GM406889139.pdf
    • http://kim-kinder-im-mittelpunkt.de/images/coin-master-pc-hack-tool_GM406889139.pdf
    • http://kim-kinder-im-mittelpunkt.de/images/free-coins-on-coin-master_GM406889139.pdf
    • http://kim-kinder-im-mittelpunkt.de/images/free-roblox-promo-codes-for-robux_GM431946152.pdf
    • http://kim-kinder-im-mittelpunkt.de/images/coin-master-daily-free-spins-and-coins_GM406889139.pdf
    • http://kim-kinder-im-mittelpunkt.de/images/how-to-hack-coin-master-with-root_GM406889139.pdf
    • http://kim-kinder-im-mittelpunkt.de/images/minecraft-mod-menu_GM479516143.pdf
    • http://kim-kinder-im-mittelpunkt.de/images/roblox-girl-avatar_GM431946152.pdf
    • http://kim-kinder-im-mittelpunkt.de/images/www-roblox-com-robux-free_GM431946152.pdf
    • http://kim-kinder-im-mittelpunkt.de/images/how-to-get-a-free-dominus-in-roblox_GM431946152.pdf
    • http://kim-kinder-im-mittelpunkt.de/images/free-coin-master-spin-and-coin-link_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004c1f.bin
407e2c3e678a97fd97d0b956a43979d9ef3a83a11eaf55b6f336902705e00732
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C1F 26524 bytes
font_01_sfnt_off00008858.bin
df154610b6efbd4d042b7dd8e86d5cfe30e06380d3f41432299740dca1959b28
pdf-font-stream PDF embedded font (sfnt) at offset 0x8858 18556 bytes