Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3a10c62c47ac844…

MALICIOUS

PDF

39.2 KB Created: 2021-05-21 03:11:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: ece4f613cc4f3030b052a9196de49c24 SHA-1: 507146ed5e26eabaaab7c16d6e99468b51552448 SHA-256: e3a10c62c47ac844980832fa1d8bdf6ee1ed3dec94e65937cf0f7c9c7f27ff0e
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The document displays a fake CAPTCHA and a 'CLICK HERE TO ACCESS ROBLOX GENERATOR' call-to-action, luring the user to click on a URL that likely leads to a malicious download. The ML classifier also flagged this PDF as malicious. The primary IOC is the URL embedded in the document body and also identified by heuristics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8060

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/roblox-hack-me-game-hack PDF link annotation
    • https://ibelive.com.tw/image/data/files/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/how-to-install-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/blogspot-coin-master_GM406889139.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/how-do-you-get-robux-on-roblox_GM431946152.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
stream_002_off00002fc4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2FC4 26140 bytes
SHA-256: b82eee70d3cd4bda5d7ce6a4475d46e917a8a2e33297ba968ce63edeb120df74
font_01_sfnt_off00006a95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A95 5596 bytes
SHA-256: 9a13c2580265a78e8a7257496a31ee0055738af7e20a5661c2902efe4bf05ce5
font_02_sfnt_off0000773c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x773C 18376 bytes
SHA-256: aef395c884b1121fa113f915db4056a7b0027cd471dc4d96a5cdd03c50f60cf3

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