Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7da4ec88be6a6e4…

MALICIOUS

PDF

34.7 KB Created: 2021-06-28 02:38:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 4319d6cd22bf1fc89685d63792435109 SHA-1: 55589c34f2ec540cadb4152136fca363ad74b608 SHA-256: e7da4ec88be6a6e44e53dc7ff262a1236de5b6fc4eaa8038ad39a3cbffc1ca94
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links to external websites, many of which are hosted on `shopinkart.co.in` and appear to be part of a link farm designed to distribute malicious files. The document body and heuristics indicate a lure related to game cheats and hacks for popular games like Roblox, suggesting a phishing or malware distribution attempt. The presence of `wkhtmltopdf` and the structure of the URLs suggest it may be an attempt to generate SEO traffic for malicious content.

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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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/comandos-cmd-juegos-hack-roblox-game-hack
    • https://www.shopinkart.co.in/uploaded_files/userfiles/files/roblox-c9m_GM431946152.pdf
    • https://www.shopinkart.co.in/uploaded_files/userfiles/files/hey-google-how-do-you-get-free-robux_GM431946152.pdf
    • https://www.shopinkart.co.in/uploaded_files/userfiles/files/coin-master-daily-free-spins-link-app-download_GM406889139.pdf
    • https://www.shopinkart.co.in/uploaded_files/userfiles/files/free-coin-spin-coin-master_GM406889139.pdf
    • https://www.shopinkart.co.in/uploaded_files/userfiles/files/roblox-critical-strike-secrets-cheats_GM431946152.pdf
    • https://www.shopinkart.co.in/uploaded_files/userfiles/files/robux-for-free-for-robloxcom-mobile4free24com_GM431946152.pdf
    • https://www.shopinkart.co.in/uploaded_files/userfiles/files/how-to-get-free-robux-no-verification-ios_GM431946152.pdf
    • https://www.shopinkart.co.in/uploaded_files/userfiles/files/free-robux-hack_GM431946152.pdf
    • https://www.shopinkart.co.in/uploaded_files/userfiles/files/coinmaster-twitter_GM406889139.pdf
    • https://www.shopinkart.co.in/uploaded_files/userfiles/files/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdf
    • https://www.shopinkart.co.in/uploaded_files/userfiles/files/rbxfree-com-free-robux_GM431946152.pdf
    • https://www.shopinkart.co.in/uploaded_files/userfiles/files/admin-hack-roblox-2021_GM431946152.pdf
    • https://www.shopinkart.co.in/uploaded_files/userfiles/files/robux-gift-card-free_GM431946152.pdf
    • https://www.shopinkart.co.in/uploaded_files/userfiles/files/coin-master-cheats-free-spins_GM406889139.pdf
    • https://www.shopinkart.co.in/uploaded_files/userfiles/files/is-there-an-actual-hack-that-work-for-coin-master_GM406889139.pdf
    • https://www.shopinkart.co.in/uploaded_files/userfiles/files/hack-coin-master-for-free_GM406889139.pdf
    • https://www.shopinkart.co.in/uploaded_files/userfiles/files/coin-master-spin-hack-trick_GM406889139.pdf
    • https://www.shopinkart.co.in/uploaded_files/userfiles/files/coin-master-hack-version-2021_GM406889139.pdf
    • https://www.shopinkart.co.in/uploaded_files/userfiles/files/how-to-get-free-robux-for-computer-nly_GM431946152.pdf
    • https://www.shopinkart.co.in/uploaded_files/userfiles/files/how-to-ruux-robux-for-free-grantz_GM431946152.pdf
    • http://netcdn.co/app/431946
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000030cd.bin
918b5579231bc5cd747cee388b8b25f75ac85b91eed55327a16441f8d995f280
pdf-font-stream PDF embedded font (sfnt) at offset 0x30CD 22044 bytes
font_01_sfnt_off00006178.bin
a161ddbe27bbaf5c7355569a8301f553f12426d4d58bc440413470a92c9c70c1
pdf-font-stream PDF embedded font (sfnt) at offset 0x6178 19396 bytes