Malicious PDF — malware analysis report

Static analysis result for SHA-256 02ad873318c563c4…

MALICIOUS

PDF

42.1 KB Created: 2021-05-23 20:56:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 5882f12c00168907a5dbb39fee842cd7 SHA-1: ca029d36f09cd2b712200fcdd1b2a258b7edee1e SHA-256: 02ad873318c563c4b0928ae1b102225d7f1abf484d8a286fbaf7818b791f046a
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a fake CAPTCHA lure, aiming to trick the user into clicking a link. The embedded URL and other extracted URLs point to potentially malicious content, likely a second-stage download. The ML classifier also flagged this PDF as malicious, increasing confidence in its malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9506

Heuristics 4

  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/how-to-hack-roblox-accounts-2021-game-hack
    • https://datavoiz.com/images/minecraft-java-free-trial_GM479516143.pdf
    • https://datavoiz.com/images/free-spins-in-coin-master-2021_GM406889139.pdf
    • https://datavoiz.com/images/play-minecraft-for-free_GM479516143.pdf
    • https://datavoiz.com/images/www-free-robux_GM431946152.pdf
    • https://datavoiz.com/images/free-games-like-minecraft_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000034c2.bin
7a7e7f1120fc4daf778d90f7b1dc9969317fb2796fb1b192389f2308c1d75702		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x34C2 35024 bytes
font_01_sfnt_off0000816c.bin
91904dcb98687fcf58c7b52e545a9fbf658b3e4d1998331468638ebaf1d03505		 pdf-font-stream PDF embedded font (sfnt) at offset 0x816C 18992 bytes

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