Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dc76c82663e4c6e…

MALICIOUS

PDF

35.6 KB Created: 2021-05-20 15:21:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 51302d44a94d1c2c26b7bf1f5111cb6a SHA-1: 8a3a4dd32c49b9efc4a2bfe7a10483d6e5cbd7ff SHA-256: 7dc76c82663e4c6e5409cf4129bb172f515a3f8fa461867eef2fd8f45575b58d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File T1059.003 Windows Command Shell

The PDF document contains lures related to game hacks and generators, specifically mentioning Roblox. It includes embedded URLs pointing to suspicious domains and explicitly instructs the user to click a download button and potentially use command-line execution, indicating a likely attempt to trick the user into downloading and executing a second-stage payload. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9492

Heuristics 4

  • 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
  • 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/431946152/roblox-rape-hack-game-hack PDF link annotation
    • http://nod74.ru/images/how-do-you-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://nod74.ru/images/free-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://nod74.ru/images/free-robux-site_GM431946152.pdfIn PDF document text
    • http://nod74.ru/images/today-free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://nod74.ru/images/free-robux-glitch-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003194.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3194 24636 bytes
SHA-256: e7f34c39fe37a55cfcceb26498efe0811c64d14779af9a6509b1d3a01a548a39
font_01_sfnt_off00006984.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6984 18356 bytes
SHA-256: 8a1fe0c7231104fca4fa627868bae52978e90e92fc8d209bfe3611444447d27b

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