Malicious PDF — malware analysis report

Static analysis result for SHA-256 42abc53df52a51e0…

MALICIOUS

PDF

44.9 KB Created: 2021-05-18 03:11:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: aafdcbc57e107ae418fc0cc85b584960 SHA-1: 1ebdb3a52fe3053dcef65c66297f8261819a85aa SHA-256: 42abc53df52a51e01bae6221542da25fab3cd19393509e23ec91bcc527910ee5
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of a malicious lure, employing a fake CAPTCHA to trick users into interacting with embedded links. The document contains a large number of external links, many pointing to PDF files on junktiquecollector.com, suggesting a link farm or SEO poisoning tactic. The primary URL, https://netcdn.xyz/app/431946152/how-do-u-get-free-robux-game-hack, is likely the ultimate destination for the scam.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/431946152/how-do-u-get-free-robux-game-hack
    • http://junktiquecollector.com/images/apps-to-get-free-robux_GM431946152.pdf
    • http://junktiquecollector.com/images/how-to-hack-someones-minecraft-account_GM479516143.pdf
    • http://junktiquecollector.com/images/minecraft-free-no-virus_GM479516143.pdf
    • http://junktiquecollector.com/images/i-didnt-get-my-free-spins-in-coin-master_GM406889139.pdf
    • http://junktiquecollector.com/images/roblox-sexually_GM431946152.pdf
    • http://junktiquecollector.com/images/get-me-robux-for-free_GM431946152.pdf
    • http://junktiquecollector.com/images/free-robux-no-human-verify_GM431946152.pdf
    • http://junktiquecollector.com/images/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdf
    • http://junktiquecollector.com/images/coin-master-spins-free-2021_GM406889139.pdf
    • http://junktiquecollector.com/images/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdf
    • http://junktiquecollector.com/images/roblox-but_GM431946152.pdf
    • http://junktiquecollector.com/images/free-robux-hack-no-human-verification_GM431946152.pdf
    • http://junktiquecollector.com/images/how-to-hack-a-roblox-account-easy_GM431946152.pdf
    • http://junktiquecollector.com/images/free-robux-that-actually-works-2021_GM431946152.pdf
    • http://junktiquecollector.com/images/to-get-free-robux_GM431946152.pdf
    • http://junktiquecollector.com/images/coin-master-new-link-free-spin_GM406889139.pdf
    • http://junktiquecollector.com/images/coin-master-hack-spins-and-coins-unlimited-free-download_GM406889139.pdf
    • http://junktiquecollector.com/images/coin-master-strategy_GM406889139.pdf
    • http://junktiquecollector.com/images/freerobux-co_GM431946152.pdf
    • http://junktiquecollector.com/images/websites-for-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b92.bin
3b8ffee6828c3a63ad0b3de1c601154fbd5bfb00a6167686769cb4b540360b40		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B92 27408 bytes
font_01_sfnt_off00008c2f.bin
ab6f51fdb1eed883fd21dff3bd0336e3a1b816e6c21a8924207bfe84ed9a007e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C2F 18636 bytes

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