Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb5e6f9615a3280b…

MALICIOUS

PDF

45.6 KB Created: 2021-05-19 19:47:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 96ef175e652541f93ae0da2ffca308d5 SHA-1: acdd2b365aeb9eefe482d24e9386701dfa7af767 SHA-256: eb5e6f9615a3280b6ced12c1b6e06a6f1964ffb8b67dc895136da8cf224ba153
102 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many of which are related to game cheats and hacks for popular games like Coin Master and Roblox. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, and the ML classifier flagged it as malicious. The document likely serves as a lure to download malicious files or visit phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

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/coinmasterfreespins-game-hack
    • https://zarco.co.in/uploaded_files/userfiles/files/minecraft-bedrock-download_GM479516143.pdf
    • https://zarco.co.in/uploaded_files/userfiles/files/how-to-get-free-robux-without-downloading-apps_GM431946152.pdf
    • https://zarco.co.in/uploaded_files/userfiles/files/minecraft-windows-10-edition-free_GM479516143.pdf
    • https://zarco.co.in/uploaded_files/userfiles/files/free-spins-on-coin-master-game_GM406889139.pdf
    • https://zarco.co.in/uploaded_files/userfiles/files/boku-no-roblox-hack_GM431946152.pdf
    • https://zarco.co.in/uploaded_files/userfiles/files/how-to-get-robux-without-human-verification_GM431946152.pdf
    • https://zarco.co.in/uploaded_files/userfiles/files/how-to-get-free-robux-gift-cards_GM431946152.pdf
    • https://zarco.co.in/uploaded_files/userfiles/files/hacks-minecraft_GM479516143.pdf
    • https://zarco.co.in/uploaded_files/userfiles/files/coin-master-mod-free-download_GM406889139.pdf
    • https://zarco.co.in/uploaded_files/userfiles/files/coin-master-free-spins-save_GM406889139.pdf
    • https://zarco.co.in/uploaded_files/userfiles/files/free-spins-coin-master-links-2021_GM406889139.pdf
    • https://zarco.co.in/uploaded_files/userfiles/files/coin-master-cheat-free_GM406889139.pdf
    • https://zarco.co.in/uploaded_files/userfiles/files/how-to-get-free-robux-without-verifying-2021_GM431946152.pdf
    • https://zarco.co.in/uploaded_files/userfiles/files/coin-master-free-spins-link-2021-download_GM406889139.pdf
    • https://zarco.co.in/uploaded_files/userfiles/files/free-coins-coin-master-link_GM406889139.pdf
    • https://zarco.co.in/uploaded_files/userfiles/files/how-to-get-free-spins-on-coin-master-iphone_GM406889139.pdf
    • https://zarco.co.in/uploaded_files/userfiles/files/how-to-get-free-roebucks-in-roblox_GM431946152.pdf
    • https://zarco.co.in/uploaded_files/userfiles/files/daily-free-spins-coin-master-2021_GM406889139.pdf
    • https://zarco.co.in/uploaded_files/userfiles/files/free-robux-without-any-verification_GM431946152.pdf
    • https://zarco.co.in/uploaded_files/userfiles/files/hack-coin-master-app-ios_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b40.bin
944bab793b1ae20c11c636dab6092d8e344b98f26c4b135ce327a3d745fc3aa4		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B40 25012 bytes
font_01_sfnt_off00008572.bin
4b3e0f36ad1e0c7e3ea5c178fd2b4f097d1e01575fc6a4101a8b520db34dfe07		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8572 3400 bytes
font_02_sfnt_off0000909c.bin
48872130680f0d6309128a4b322cbb0730700ec4544966fd5aa3d357de7636d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x909C 17980 bytes

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