Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e8639e24001f1d4…

MALICIOUS

PDF

35.2 KB Created: 2021-06-28 16:19:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: e976283e35c6d64d92ab7de6fc92af76 SHA-1: a3f4f4226782ef73982dc1e05e38715653f7494f SHA-256: 2e8639e24001f1d4b9f982b741683b2c527e82c2e274d5d5b767237edc51eb5d
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a large number of external links, many of which are presented as downloadable files related to game hacks and in-game currency. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, and the ML classifier strongly flagged this PDF as malicious. The presence of a 'download button' lure further supports a malicious intent to trick users into downloading potentially harmful content.

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.co/app/431946152/robux-sites-hacks-game-hack
    • https://doingimc.com/image/data/files/free-robux-that-actually-works_GM431946152.pdf
    • https://doingimc.com/image/data/files/coin-master-cards-hack-2021_GM406889139.pdf
    • https://doingimc.com/image/data/files/how-to-download-minecraft-windows-10-edition-for-free_GM479516143.pdf
    • https://doingimc.com/image/data/files/minecraft-java-edition-for-free_GM479516143.pdf
    • https://doingimc.com/image/data/files/free-tiktok-followers-without-downloading-apps_GM835599320.pdf
    • https://doingimc.com/image/data/files/hack-mod-coin-master_GM406889139.pdf
    • https://doingimc.com/image/data/files/coin-master-hack-spins-free_GM406889139.pdf
    • https://doingimc.com/image/data/files/how-to-minecraft-for-free_GM479516143.pdf
    • https://doingimc.com/image/data/files/how-to-change-username-on-roblox-for-free_GM431946152.pdf
    • https://doingimc.com/image/data/files/free-minecraft-education-edition_GM479516143.pdf
    • https://doingimc.com/image/data/files/roblox-games-that-give-you-free-robux_GM431946152.pdf
    • https://doingimc.com/image/data/files/free-games-like-coin-master_GM406889139.pdf
    • https://doingimc.com/image/data/files/how-to-get-minecraft-pe-for-free_GM479516143.pdf
    • https://doingimc.com/image/data/files/get-free-robux-easy_GM431946152.pdf
    • https://doingimc.com/image/data/files/hack-minecraft_GM479516143.pdf
    • https://doingimc.com/image/data/files/master-coin-free-link_GM406889139.pdf
    • https://doingimc.com/image/data/files/can-i-get-robux-for-free_GM431946152.pdf
    • https://doingimc.com/image/data/files/how-to-get-minecraft-dungeons-for-free_GM479516143.pdf
    • https://doingimc.com/image/data/files/roblox-hacks-pc-2021_GM431946152.pdf
    • https://doingimc.com/image/data/files/roblox-hacked-twitter_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000312e.bin
b5a4ba6b7e27fe8022152ec30995c09198c1ed26ee4cdfd22fc2502c91cb474d
pdf-font-stream PDF embedded font (sfnt) at offset 0x312E 23136 bytes
font_01_sfnt_off000064f0.bin
8fe2eb69aaaa9fef20e6d52219429da27e12e4cba977f99389dca4c7f436b3f8
pdf-font-stream PDF embedded font (sfnt) at offset 0x64F0 18948 bytes