Malicious PDF — malware analysis report

Static analysis result for SHA-256 d70b4fadd71bab4a…

MALICIOUS

PDF

45.7 KB Created: 2021-05-17 13:20:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: d69c4da6c966057aeaa04c0b27f6b0bb SHA-1: 145f746bb9d5219413b5fd92e7d61489d4f25a98 SHA-256: d70b4fadd71bab4a65ec05152d3c1912f1cd1201f4bd4f797aca7155fb258bb8
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The document uses a lure of a free Minecraft download to entice users, and contains embedded links to external sites that likely host malicious content. It also includes instructions to copy and paste content into a command-line interface, suggesting an attempt to execute further malicious code. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

Heuristics 5

  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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/minecraft-apk-free-download-0.16-0-game-hack PDF link annotation
    • https://www.brainpads.com/images/blox-fun-info_GM431946152.pdfIn PDF document text
    • https://www.brainpads.com/images/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://brainpads.com/images/download-minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • https://brainpads.com/images/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • https://brainpads.com/images/hack-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://brainpads.com/images/free-minecraft-java-code_GM479516143.pdfIn PDF document text
    • https://www.brainpads.com/images/free-robux-com_GM431946152.pdfIn PDF document text
    • https://brainpads.com/images/free-links-coin-master_GM406889139.pdfIn PDF document text
    • https://www.brainpads.com/images/coin-master-free-coins-and-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://brainpads.com/images/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • https://www.brainpads.com/images/password-free-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://brainpads.com/images/coinmaster-rewards_GM406889139.pdfIn PDF document text
    • https://www.brainpads.com/images/roblox-land-free-robux_GM431946152.pdfIn PDF document text
    • https://www.brainpads.com/images/archery-master-3d-unlimited-coins-hack_GM406889139.pdfIn PDF document text
    • https://brainpads.com/images/aimbot-download-roblox_GM431946152.pdfIn PDF document text
    • https://www.brainpads.com/images/roblox-com-hack_GM431946152.pdfIn PDF document text
    • https://brainpads.com/images/roblox-hack-scripts-pastebin_GM431946152.pdfIn PDF document text
    • https://www.brainpads.com/images/download-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://brainpads.com/images/master-coin-hack_GM406889139.pdfIn PDF document text
    • https://brainpads.com/images/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004b59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B59 24888 bytes
SHA-256: 458188f60316c068bc93128130eacbc167ceae15de92da0dc56a95208f0475bb
font_01_sfnt_off000083a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83A7 2820 bytes
SHA-256: 96a70491b0783ad8c6fc9b11a18f021aa22c69ac41ee4499b781d16a1b99b689
font_02_sfnt_off00008d48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D48 19148 bytes
SHA-256: 143cdc4e5324f1572c7170c4fe37a033449aea51cdd3ec4d91b7fb0cb62456a0

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