Malicious PDF — malware analysis report

Static analysis result for SHA-256 68137f331674cf53…

MALICIOUS

PDF

45.0 KB Created: 2021-05-20 20:46:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 636cb17cfe30c07b0b412e9a8d3ade83 SHA-1: 04be362ae61daf4412316fb0d5e59c37042c60b0 SHA-256: 68137f331674cf5305b11debb4762b88a84729f3740567a36cc164f74cf463d2
82 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure and a call-to-action button, directing users to external URLs that claim to offer tools for hacking Roblox accounts. The presence of multiple related URLs and the ML classifier's high confidence score indicate a malicious intent to deceive users into visiting potentially harmful sites. No scripts were extracted, limiting the analysis to the document's visual and textual lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7542

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-passwords-game-hack
    • https://kupinapopust.mk/pub/img/userfiles/files/how-to-get-free-robux-without-offers_GM431946152.pdf
    • https://kupinapopust.mk/pub/img/userfiles/files/coin-master-free-coins-and-spins-today_GM406889139.pdf
    • https://kupinapopust.mk/pub/img/userfiles/files/instant-robux_GM431946152.pdf
    • https://kupinapopust.mk/pub/img/userfiles/files/coin-master-2021-free-spins-link-today_GM406889139.pdf
    • https://kupinapopust.mk/pub/img/userfiles/files/coin-master-spin-hack-pc_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000032e2.bin
6a6b30814c2532e75bc70a632723cc8053bd6aa8c4f1524a8b0d21d774062e94		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32E2 37132 bytes
font_01_sfnt_off00008313.bin
dcdd98ee8e25436a83587ccb4027347dd2c3fcec95f3413942edd4086125bcca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8313 2888 bytes
font_02_sfnt_off00008ce7.bin
1a35cdd5966ddf5a07fa4c0cf1a4b7623ebf18d314e768fc1998c6779142cc7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CE7 18916 bytes

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