Malicious PDF — malware analysis report

Static analysis result for SHA-256 d645b9d4627c2cfa…

MALICIOUS

PDF

41.5 KB Created: 2021-05-15 07:27:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 6269fe8a71e8383c6cbbd6ed9c66cccd SHA-1: fc681275f08fc06550d25cc51b02d7024bc6d5b3 SHA-256: d645b9d4627c2cfac216bf5b76218f337ffec3bc8547631b767b56f450402d2e
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous embedded URLs, many of which are part of a link farm designed to attract users searching for game cheats and hacks. The document body and extracted URLs suggest a lure for downloading potentially unwanted or malicious software related to games like Coin Master and Roblox. While no scripts were explicitly extracted, the PDF structure and embedded links indicate a malicious workflow aimed at redirecting users to external sites for downloads.

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/free-spin-coin-master-hacktoman-game-hack
    • http://akvamaster.com.ua/images/roblox-royale-high-diamond-hack_GM431946152.pdf
    • http://akvamaster.com.ua/images/coin-master-game-for-pc-free-download_GM406889139.pdf
    • http://akvamaster.com.ua/images/free-spins-coin-master-october-13-2021_GM406889139.pdf
    • http://akvamaster.com.ua/images/free-robux-without-doing-anything_GM431946152.pdf
    • http://akvamaster.com.ua/images/minecraft-client_GM479516143.pdf
    • http://akvamaster.com.ua/images/coin-master-hack-tool-v1-9-download-free-pc_GM406889139.pdf
    • http://akvamaster.com.ua/images/coin-master-cracked-apk-free-download_GM406889139.pdf
    • http://akvamaster.com.ua/images/coin-master-free-spins-and-coins-daily_GM406889139.pdf
    • http://akvamaster.com.ua/images/roblox-system_GM431946152.pdf
    • http://akvamaster.com.ua/images/coin-master-free-gift-links-2021_GM406889139.pdf
    • http://akvamaster.com.ua/images/coin-master-free-spins-1-coin-master_GM406889139.pdf
    • http://akvamaster.com.ua/images/google-how-do-you-get-free-robux_GM431946152.pdf
    • http://akvamaster.com.ua/images/minecraft-games-to-play-for-free_GM479516143.pdf
    • http://akvamaster.com.ua/images/clean-master-free-coins-and-spins_GM406889139.pdf
    • http://akvamaster.com.ua/images/play-roblox-free-online_GM431946152.pdf
    • http://akvamaster.com.ua/images/free-robux-master_GM431946152.pdf
    • http://akvamaster.com.ua/images/hack-robux_GM431946152.pdf
    • http://akvamaster.com.ua/images/how-to-make-a-private-server-on-roblox-for-free_GM431946152.pdf
    • http://akvamaster.com.ua/images/minecraft-pe-free-download_GM479516143.pdf
    • http://akvamaster.com.ua/images/roblox-group-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000047fa.bin
a4d4b6275b106fa62fe289555966f7eb8c8a7cb90110956eb601a79257bacb83
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47FA 24280 bytes
font_01_sfnt_off00007fc0.bin
a162431701ad9c50befa351cb2f766b34b20a7e8a0fbff5e47df8aa15cd4efd7
pdf-font-stream PDF embedded font (sfnt) at offset 0x7FC0 18316 bytes