Malicious PDF — malware analysis report

Static analysis result for SHA-256 616f7ee9ffad09f0…

MALICIOUS

PDF

44.9 KB Created: 2021-05-12 23:03:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: abc83e5488d9ec77fb1bf3a4c86d60cf SHA-1: 1ecd269943e311276e46cbedbb8bf6decdea77f7 SHA-256: 616f7ee9ffad09f0fb2d7152481f3ce7ad472dffa98a76ef0b3c4adfd0ec20bb
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to external PDF files. The primary URL, https://netcdn.xyz/app/406889139/hack-coin-master-link-game-hack, suggests a lure for game-related cheats or hacks. The document body, though heavily obfuscated, contains references to 'hack-coin-master-link-game-hack', reinforcing the lure. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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/hack-coin-master-link-game-hack
    • https://www.europap.cz/images/minecraft-wurst_GM479516143.pdf
    • https://www.europap.cz/images/how-to-make-a-server-in-minecraft-java-for-free_GM479516143.pdf
    • https://www.europap.cz/images/minecraft-survival-hacks_GM479516143.pdf
    • https://www.europap.cz/images/can-i-get-minecraft-windows-10-for-free_GM479516143.pdf
    • https://www.europap.cz/images/coin-master-daily-spins-and-coins_GM406889139.pdf
    • https://www.europap.cz/images/coin-master-free-spins-fb-champion_GM406889139.pdf
    • https://www.europap.cz/images/coin-master-apk_GM406889139.pdf
    • https://www.europap.cz/images/25-free-spins-coin-master_GM406889139.pdf
    • https://www.europap.cz/images/free-minecraft-account-and-password-2021_GM479516143.pdf
    • https://www.europap.cz/images/haktuts-coin-master-free-spins_GM406889139.pdf
    • https://www.europap.cz/images/free-robux-no-human-verification-or-survey_GM431946152.pdf
    • https://www.europap.cz/images/free-spin-in-coin-master_GM406889139.pdf
    • https://www.europap.cz/images/roblox-hacking-website_GM431946152.pdf
    • https://www.europap.cz/images/coin-master-free-spins-hack-no-human-verification_GM406889139.pdf
    • https://www.europap.cz/images/today-free-spin-coin-master_GM406889139.pdf
    • https://www.europap.cz/images/minecraft-pe-apk_GM479516143.pdf
    • https://www.europap.cz/images/coin-master-free-spins-app_GM406889139.pdf
    • https://www.europap.cz/images/free-robux-2021-no-human-verification_GM431946152.pdf
    • https://www.europap.cz/images/minecraft-games-free-to-play-online_GM479516143.pdf
    • https://www.europap.cz/images/how-to-hack-roblox-to-get-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000494a.bin
7ef80e11f7a9080876a992cef067bdc8e722da884e0d57a3294fb0bf4a651596
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x494A 25120 bytes
font_01_sfnt_off00008282.bin
1dd933c112880b232546f3aab6a17784a8f412d39fd551cc6eb31c5a04c3ce57
pdf-font-stream PDF embedded font (sfnt) at offset 0x8282 3380 bytes
font_02_sfnt_off00008e6b.bin
7a2147665fdabc5cddb25f595f31131d5d2283434a8b54cc276e8057d1a6620b
pdf-font-stream PDF embedded font (sfnt) at offset 0x8E6B 17716 bytes