Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb8dc2f5ed047daf…

MALICIOUS

PDF

42.5 KB Created: 2021-05-19 10:46:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 3b5780f2bbca76e818cce76a5c6f28e3 SHA-1: 06885892f7b35865ff8906751f255f3b71b6d512 SHA-256: cb8dc2f5ed047daf2e9617364501b4084a699b602997efa82fd2252e54a85e3c
82 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA or human verification prompt to trick the user into clicking a link. This link, 'https://netcdn.xyz/app/431946152/free-robux-no-apps-game-hack', likely leads to the download of a second-stage payload. The ML classifier strongly indicated maliciousness, supporting the observed social engineering tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/free-robux-no-apps-game-hack
    • http://jijel.info/images/free-coin-master-spins-without-human-verification_GM406889139.pdf
    • http://jijel.info/images/minecraft-pocket-edition-free-download_GM479516143.pdf
    • http://jijel.info/images/how-to-hack-minecraft_GM479516143.pdf
    • http://jijel.info/images/coin-master-coin-hack_GM406889139.pdf
    • http://jijel.info/images/coin-master-free-spins-link-today-twitter_GM406889139.pdf
    • http://jijel.info/images/how-to-win-free-robux_GM431946152.pdf
    • http://jijel.info/images/free-roblox-shirt-templates_GM431946152.pdf
    • http://jijel.info/images/coin-master-free-spin-and-coins-links_GM406889139.pdf
    • http://jijel.info/images/roblox-hack-me-robux_GM431946152.pdf
    • http://jijel.info/images/how-to-get-free-coins-and-spins-on-coin-master_GM406889139.pdf
    • http://jijel.info/images/coin-master-free-spins-and-coins-2021_GM406889139.pdf
    • http://jijel.info/images/coin-master-free-spin-link-app_GM406889139.pdf
    • http://jijel.info/images/earn-free-robux-for-roblox_GM431946152.pdf
    • http://jijel.info/images/free-robux-survey_GM431946152.pdf
    • http://jijel.info/images/hack-my-spins-coin-master_GM406889139.pdf
    • http://jijel.info/images/free-roblox-com_GM431946152.pdf
    • http://jijel.info/images/free-robux-hacks-no-verification_GM431946152.pdf
    • http://jijel.info/images/free-minecraft-account-reddit_GM479516143.pdf
    • http://jijel.info/images/coin-master-free-spins-link-quora_GM406889139.pdf
    • http://jijel.info/images/free-robux-android_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000047ca.bin
c70066475e1d194b8576caee02c837918252eecfad26e1076b18bf613f726dcd		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47CA 25692 bytes
font_01_sfnt_off00008401.bin
dd781f2eaffddff6619a7729b763fabd5b8c4a088eef07f4c149f41bf202d502		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8401 18192 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.