Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a0f58794de00b0c…

MALICIOUS

PDF

41.9 KB Created: 2021-05-19 08:33:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 330fc09ada07d6626ca8f08c01901d64 SHA-1: 1aa312ababc07f28446f97b724ee279035f91c77 SHA-256: 7a0f58794de00b0cb499735abc0fdf0769fd2e2129f22b4537c876b5b050d730
142 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure, designed to trick users into interacting with malicious links. It hosts a large number of external links, many pointing to PDF files on `whiteyaknepal.com`, suggesting a link farm or SEO spam campaign. The primary URL `https://netcdn.xyz/app/406889139/coin-master-free-attack-hack-game-hack` is likely the final destination for the malicious payload or scam content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/coin-master-free-attack-hack-game-hack
    • http://whiteyaknepal.com/userfiles/files/coin-master-tiradas-gratis-2021_GM406889139.pdf
    • http://whiteyaknepal.com/userfiles/files/free-spin-and-win-coin-master_GM406889139.pdf
    • http://whiteyaknepal.com/userfiles/files/roblox-free-robux-com_GM431946152.pdf
    • http://whiteyaknepal.com/userfiles/files/coin-master-hack-2021-without-human-verification_GM406889139.pdf
    • http://whiteyaknepal.com/userfiles/files/coin-master-hack-no-human-verification_GM406889139.pdf
    • http://whiteyaknepal.com/userfiles/files/toolbox-for-minecraft-pe-mod-apk_GM479516143.pdf
    • http://whiteyaknepal.com/userfiles/files/coin-master-spin-link-2021_GM406889139.pdf
    • http://whiteyaknepal.com/userfiles/files/coin-master-free-coins-and-spins-daily_GM406889139.pdf
    • http://whiteyaknepal.com/userfiles/files/how-to-get-free-spins-on-coin-master-facebook_GM406889139.pdf
    • http://whiteyaknepal.com/userfiles/files/how-to-get-free-outfits-on-roblox_GM431946152.pdf
    • http://whiteyaknepal.com/userfiles/files/links-to-get-free-spins-on-coin-master_GM406889139.pdf
    • http://whiteyaknepal.com/userfiles/files/roblox-free-robux-website_GM431946152.pdf
    • http://whiteyaknepal.com/userfiles/files/free-robux-no-verification-required_GM431946152.pdf
    • http://whiteyaknepal.com/userfiles/files/free-robux-com_GM431946152.pdf
    • http://whiteyaknepal.com/userfiles/files/coin-master-hack-spin-generator-tool_GM406889139.pdf
    • http://whiteyaknepal.com/userfiles/files/free-robux-apps-that-work_GM431946152.pdf
    • http://whiteyaknepal.com/userfiles/files/haktuts-coin-master-free-spin-link_GM406889139.pdf
    • http://whiteyaknepal.com/userfiles/files/master-coin-free-link_GM406889139.pdf
    • http://whiteyaknepal.com/userfiles/files/free-robux-legit_GM431946152.pdf
    • http://whiteyaknepal.com/userfiles/files/how-to-hack-into-someones-roblox-account_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b5b.bin
41161e314336a651853e95f5fdcce047a849baf27e4926fb22cc65963b0337f8		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B5B 24160 bytes
font_01_sfnt_off000082e3.bin
64cbdad4b5c3b3a37694725247404ca4617731c1cde232b85c3c0be6b95e7409		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82E3 17880 bytes

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