Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4cf1c2b5f1f7292…

MALICIOUS

PDF

45.4 KB Created: 2021-05-16 15:13:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: a52121d79adcf710e17514626db6354b SHA-1: 51b663cb6ba6040efde3fdb70c38443d6d007d4e SHA-256: f4cf1c2b5f1f7292728d3068580cf86268248ee7495c319e2d4c43b0dcd98bb8
82 Risk Score

Malware Insights

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

The PDF document contains embedded URLs and a document body that attempts to lure users into downloading content related to popular games like Minecraft and Roblox. The presence of a 'password-protected archive lure' heuristic suggests that the downloaded content may be encrypted to evade security checks. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

Heuristics 4

  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/479516143/how-to-download-minecraft-for-free-on-pc-game-hack
    • http://wokbaarlo.nl/images/master-free-spin-and-coin-link_GM406889139.pdf
    • http://wokbaarlo.nl/images/get-free-robux-gg_GM431946152.pdf
    • http://wokbaarlo.nl/images/roblox-studio-free_GM431946152.pdf
    • http://wokbaarlo.nl/images/coin-master-free-spins-link-today-new-2021_GM406889139.pdf
    • http://wokbaarlo.nl/images/coin-master-hack-apk-ios-download_GM406889139.pdf
    • http://wokbaarlo.nl/images/free-coin-coin-master_GM406889139.pdf
    • http://wokbaarlo.nl/images/coin-master-code-hack_GM406889139.pdf
    • http://wokbaarlo.nl/images/minecraft-pocket-edition-free-ios_GM479516143.pdf
    • http://wokbaarlo.nl/images/free-spins-coin-master-daily_GM406889139.pdf
    • http://wokbaarlo.nl/images/coin-master-hack-download-android_GM406889139.pdf
    • http://wokbaarlo.nl/images/minecraft-free-play-no-download_GM479516143.pdf
    • http://wokbaarlo.nl/images/coin-master-free-spins-link-download-free_GM406889139.pdf
    • http://wokbaarlo.nl/images/coin-master-links-that-don-t-expire_GM406889139.pdf
    • http://wokbaarlo.nl/images/free-robux-codes-generator_GM431946152.pdf
    • http://wokbaarlo.nl/images/collect-free-spins-for-coin-master_GM406889139.pdf
    • http://wokbaarlo.nl/images/free-minecraft-account-and-password_GM479516143.pdf
    • http://wokbaarlo.nl/images/coin-master-apk-mod_GM406889139.pdf
    • http://wokbaarlo.nl/images/coin-master-claim-free-spins_GM406889139.pdf
    • http://wokbaarlo.nl/images/coin-master-spin-link_GM406889139.pdf
    • http://wokbaarlo.nl/images/plug-toolbox-for-minecraft-free-ios_GM479516143.pdf
    • https://education.minecraft
    • https://freegiftcodes.eu
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004bf9.bin
ca49f4bed3910702318411bdba3c6b07bec39ac263a68ce70bdc3bf7ae8e06aa
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BF9 25032 bytes
font_01_sfnt_off000084a5.bin
787e0768241fb57660bcc9c7f726cf687277c463cdf8c586c4782ee9d03c3606
pdf-font-stream PDF embedded font (sfnt) at offset 0x84A5 2840 bytes
font_02_sfnt_off00008e64.bin
9e3148d8479467241e454dad7f95496d0753043299a483a1afd63e9d4426fe5d
pdf-font-stream PDF embedded font (sfnt) at offset 0x8E64 18444 bytes