Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9091ed9c9c26d84…

MALICIOUS

PDF

38.1 KB Created: 2021-05-21 13:08:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 1ad52ba0f254612c6c55db7033ee4d89 SHA-1: c13193e3d801f1c6b82ae93d87ed37d2945fa023 SHA-256: d9091ed9c9c26d842787d87f678944829faa061b92ca228227a8eb67796a5910
82 Risk Score

Malware Insights

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

The PDF document contains lures for free TikTok likes and directs users to click a link to access a generator, which is a common social engineering tactic. The presence of multiple suspicious URLs, including one pointing to a potential executable disguised as a PDF, strongly suggests a malicious intent to trick users into downloading malware. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9407

Heuristics 4

  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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/835599320/100-free-tiktok-likes-game-hack
    • http://bunadsmaria.com/images/free-robux-no-downloading-apps_GM431946152.pdf
    • http://bunadsmaria.com/images/free-robux-no-human-verification-or-survey-2021_GM431946152.pdf
    • http://bunadsmaria.com/images/coin-master-daily-spin-link-app_GM406889139.pdf
    • http://bunadsmaria.com/images/rbx-roblox-robux_GM431946152.pdf
    • http://bunadsmaria.com/images/how-to-hack-a-roblox-account-2021_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003e51.bin
da28f4192fdef02a61c4d9ec8915c0d254c2093f934fb6abdbc60314486c1aaa		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3E51 24056 bytes
font_01_sfnt_off00007575.bin
1b00865e4acd6ce65da32f05c0e9476b22c6f4a70aecdf287507a02fac06e95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7575 17732 bytes

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