Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc452fad5c348cfd…

MALICIOUS

PDF

41.6 KB Created: 2021-05-15 05:40:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: c2ade64460728991f5f4c1bc410e587d SHA-1: 75aaa48f8a500d8d14c0ec64d9dd15e91f8e5786 SHA-256: dc452fad5c348cfdd664534aa9a2ebcbb0b2e8636db5460ce48f35928603f9a5
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of a phishing or scam lure, presenting a fake CAPTCHA to trick users into interacting with malicious links. The document contains a large number of external links, many of which point to PDF files related to 'Coin Master' hacks, suggesting a link farm designed to drive traffic to potentially malicious sites. The ML classifier also flagged this PDF as malicious with high confidence.

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-official-page-game-hack
    • http://www.lycee-langevin-wallon.com/images/coin-master-hack-activegamer_GM406889139.pdf
    • http://www.lycee-langevin-wallon.com/images/blogspot-free-spins-coin-master_GM406889139.pdf
    • http://www.lycee-langevin-wallon.com/images/open-coin-master_GM406889139.pdf
    • http://www.lycee-langevin-wallon.com/images/coin-master-daily-free-spins-link-download_GM406889139.pdf
    • http://www.lycee-langevin-wallon.com/images/free-spin-coin-master-link-2021_GM406889139.pdf
    • http://www.lycee-langevin-wallon.com/images/impact-minecraft-hack_GM479516143.pdf
    • http://www.lycee-langevin-wallon.com/images/coin-master-hack-for-ios_GM406889139.pdf
    • http://www.lycee-langevin-wallon.com/images/coin-master-free-spins-link-2021_GM406889139.pdf
    • http://www.lycee-langevin-wallon.com/images/how-to-get-free-spins-and-coins-in-coin-master_GM406889139.pdf
    • http://www.lycee-langevin-wallon.com/images/get-free-spins-on-coin-master-no-human-verification_GM406889139.pdf
    • http://www.lycee-langevin-wallon.com/images/free-vip-server-roblox_GM431946152.pdf
    • http://www.lycee-langevin-wallon.com/images/coin-master-link-daily-get-free-spins-and-coins_GM406889139.pdf
    • http://www.lycee-langevin-wallon.com/images/free-robux-no-human-verification-2021_GM431946152.pdf
    • http://www.lycee-langevin-wallon.com/images/free-robux-link_GM431946152.pdf
    • http://www.lycee-langevin-wallon.com/images/100-robux_GM431946152.pdf
    • http://www.lycee-langevin-wallon.com/images/dominus-roblox-free_GM431946152.pdf
    • http://www.lycee-langevin-wallon.com/images/how-to-get-free-robux-without-verifying_GM431946152.pdf
    • http://www.lycee-langevin-wallon.com/images/free-robux-only-username-no-human-verification_GM431946152.pdf
    • http://www.lycee-langevin-wallon.com/images/coin-master-apk-hack-2021-ios_GM406889139.pdf
    • http://www.lycee-langevin-wallon.com/images/coin-master-daily-free-spins-link-app_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000481b.bin
ebf8663fd798f16fc0b80dfb87a4d26ded4ae7cd5ae7a169c6f2fd88bc822084		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x481B 24900 bytes
font_01_sfnt_off000080b1.bin
76611319acdf347541dc11f7e3fef89e3b6334ea52422810ed834d437ef29c2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80B1 18064 bytes

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