Malicious PDF — malware analysis report

Static analysis result for SHA-256 15ddf05b469bfa0d…

MALICIOUS

PDF

34.6 KB Created: 2021-07-06 23:15:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: c29f8891d20b62656656b2733649547e SHA-1: 46983c4e70988340fe70d8eafe32ca993aff6b5f SHA-256: 15ddf05b469bfa0dfacd026767d350e408daa93e99de07fdcaffef6ff69365f3
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, many of which are related to obtaining free game items, cheats, or hacks for popular games like Minecraft and Roblox. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm designed to attract users with deceptive content. The ML classifier also strongly flagged this PDF as malicious. The primary intent appears to be directing users to external sites that likely host malware or phishing 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.tw/app/479516143/how-to-get-minecraft-for-free-on-iphone-game-hack
    • https://www.mescosa.com/uploaded_files/userfiles/files/free-unused-roblox-toy-codes_GM431946152.pdf
    • https://www.mescosa.com/uploaded_files/userfiles/files/free-roblox-templates_GM431946152.pdf
    • https://www.mescosa.com/uploaded_files/userfiles/files/download-minecraft-free-hiapphere_GM479516143.pdf
    • https://www.mescosa.com/uploaded_files/userfiles/files/how-to-get-free-robux-2021-mac_GM431946152.pdf
    • https://www.mescosa.com/uploaded_files/userfiles/files/hack-coin-master-game-apk-download_GM406889139.pdf
    • https://www.mescosa.com/uploaded_files/userfiles/files/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdf
    • https://www.mescosa.com/uploaded_files/userfiles/files/how-to-get-free-robux-2021-2021_GM431946152.pdf
    • https://www.mescosa.com/uploaded_files/userfiles/files/free-coin-master-spins-daily_GM406889139.pdf
    • https://www.mescosa.com/uploaded_files/userfiles/files/robux-online_GM431946152.pdf
    • https://www.mescosa.com/uploaded_files/userfiles/files/free-robux-without-human-verification_GM431946152.pdf
    • https://www.mescosa.com/uploaded_files/userfiles/files/coin-master-free-spin-trick_GM406889139.pdf
    • https://www.mescosa.com/uploaded_files/userfiles/files/wurst-client-download_GM479516143.pdf
    • https://www.mescosa.com/uploaded_files/userfiles/files/coin-master-links-for-free-spins_GM406889139.pdf
    • https://www.mescosa.com/uploaded_files/userfiles/files/roblox-free-robux-code-2021_GM431946152.pdf
    • https://www.mescosa.com/uploaded_files/userfiles/files/lawn-mowing-simulator-roblox-hack_GM431946152.pdf
    • https://www.mescosa.com/uploaded_files/userfiles/files/free-minecraft-severs_GM479516143.pdf
    • https://www.mescosa.com/uploaded_files/userfiles/files/free-robux-master_GM431946152.pdf
    • https://www.mescosa.com/uploaded_files/userfiles/files/how-to-setup-a-minecraft-server-for-free_GM479516143.pdf
    • https://www.mescosa.com/uploaded_files/userfiles/files/minecraft-free-no-download_GM479516143.pdf
    • https://www.mescosa.com/uploaded_files/userfiles/files/how-to-get-free-limiteds-on-roblox-2021_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000034f7.bin
1577f3a4898955bf75c3db9542ec30a52d2b060b36fd092f07565c97041b9126		 pdf-font-stream PDF embedded font (sfnt) at offset 0x34F7 21624 bytes
font_01_sfnt_off00006426.bin
6665b1a72a16fc3686c54572aaa4f088f2a91746797a65c7d397a9eaf4cdea45		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6426 18504 bytes

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