Malicious PDF — malware analysis report

Static analysis result for SHA-256 34598a4e3de1e74a…

MALICIOUS

PDF

41.1 KB Created: 2021-05-16 16:34:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: e20a4fcd0c48a8620f352d2d513044ef SHA-1: a72f41304b49d36516186e07180e4f63fbf9bd57 SHA-256: 34598a4e3de1e74a935077e533fc3576f3c2fe8a8f41b9bb6e9257fcf407c638
82 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA lure, a common tactic to deceive users into interacting with malicious content. It contains an external URI pointing to a URL that likely serves as a download source for a secondary payload. The presence of numerous similar URLs suggests a campaign distributing potentially unwanted or malicious applications.

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/406889139/free-spins-coin-master-2021-hack-game-hack
    • http://ohsawamacrobiotics.com/images/give-free-robux_GM431946152.pdf
    • http://ohsawamacrobiotics.com/images/coin-master-daily-free-spins-link-today_GM406889139.pdf
    • http://ohsawamacrobiotics.com/images/minecraft-client_GM479516143.pdf
    • http://ohsawamacrobiotics.com/images/coin-master-hack-apk-2021-download_GM406889139.pdf
    • http://ohsawamacrobiotics.com/images/roblox-hacked-com-2021_GM431946152.pdf
    • http://ohsawamacrobiotics.com/images/coin-master-35-13-hack-download_GM406889139.pdf
    • http://ohsawamacrobiotics.com/images/apps-for-free-spins-on-coin-master_GM406889139.pdf
    • http://ohsawamacrobiotics.com/images/games-to-get-free-robux_GM431946152.pdf
    • http://ohsawamacrobiotics.com/images/free-robux-scams_GM431946152.pdf
    • http://ohsawamacrobiotics.com/images/free-roblox-printables_GM431946152.pdf
    • http://ohsawamacrobiotics.com/images/microsoft-free-robux_GM431946152.pdf
    • http://ohsawamacrobiotics.com/images/how-to-get-free-robux-hack-2021_GM431946152.pdf
    • http://ohsawamacrobiotics.com/images/free-coin-master-links_GM406889139.pdf
    • http://ohsawamacrobiotics.com/images/minecraft-app-free-download_GM479516143.pdf
    • http://ohsawamacrobiotics.com/images/minecraft-pe-free-download_GM479516143.pdf
    • http://ohsawamacrobiotics.com/images/roblox-shirt-template-free_GM431946152.pdf
    • http://ohsawamacrobiotics.com/images/coin-master-hack-tool-v1-9_GM406889139.pdf
    • http://ohsawamacrobiotics.com/images/free-100-robux_GM431946152.pdf
    • http://ohsawamacrobiotics.com/images/free-robux-games-that-actually-work-2021_GM431946152.pdf
    • http://ohsawamacrobiotics.com/images/coin-master-hack-no-verification-no-signup_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000045fe.bin
2d22419796c3fcd2d3d4d2d25b090cd4ad313d03a2f41e1ea92dd6315ddb06a4		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x45FE 24328 bytes
font_01_sfnt_off00007db8.bin
a5560883dc18b22b6e1d4164516743640258d4849b8ee5f58e623da8a68570df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DB8 18456 bytes

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