Malicious PDF — malware analysis report

Static analysis result for SHA-256 52014212051f3483…

MALICIOUS

PDF

42.0 KB Created: 2021-05-15 00:02:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: dc5a19c4f165ff0dba23bca552f3fc49 SHA-1: 2063617df8d31c817178e5a72cb3c2b3976a54e2 SHA-256: 52014212051f3483a7eba48b28da61295a68423184e135a704b39e3aa627aacb
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of external links, many of which point to PDF files hosted on `plastic-surgery.pl`. The document also displays a fake CAPTCHA, a common lure to trick users into interacting with malicious content. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent. No scripts were extracted, but the presence of numerous links and the fake CAPTCHA suggest a phishing or scamming attempt.

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-spins-link-june-2021-game-hack
    • http://plastic-surgery.pl/images/robux-redeem_GM431946152.pdf
    • http://plastic-surgery.pl/images/free-spin-coin-master-new-link_GM406889139.pdf
    • http://plastic-surgery.pl/images/get-free-robux-no-human-verification_GM431946152.pdf
    • http://plastic-surgery.pl/images/coin-master-hack-spins-app_GM406889139.pdf
    • http://plastic-surgery.pl/images/coin-master-real-free-spins_GM406889139.pdf
    • http://plastic-surgery.pl/images/how-to-win-attack-madness-in-coin-master-hack_GM406889139.pdf
    • http://plastic-surgery.pl/images/sites-to-get-free-robux_GM431946152.pdf
    • http://plastic-surgery.pl/images/free-spins-coin-master-links_GM406889139.pdf
    • http://plastic-surgery.pl/images/2021-free-coin-master-spins_GM406889139.pdf
    • http://plastic-surgery.pl/images/how-to-get-free-robux-on-computer_GM431946152.pdf
    • http://plastic-surgery.pl/images/how-to-hack-roblox-to-get-robux_GM431946152.pdf
    • http://plastic-surgery.pl/images/coin-master-hack-apk-android-1_GM406889139.pdf
    • http://plastic-surgery.pl/images/coin-master-hack-tool-v1-9-download_GM406889139.pdf
    • http://plastic-surgery.pl/images/best-free-robux-sites_GM431946152.pdf
    • http://plastic-surgery.pl/images/coin-master-free-link_GM406889139.pdf
    • http://plastic-surgery.pl/images/coin-master-jackpot-hack_GM406889139.pdf
    • http://plastic-surgery.pl/images/password-free-roblox-accounts_GM431946152.pdf
    • http://plastic-surgery.pl/images/coin-master-free-2021-spin-link_GM406889139.pdf
    • http://plastic-surgery.pl/images/roblox-mobile-hack_GM431946152.pdf
    • http://plastic-surgery.pl/images/hack-para-coin-master-singapore_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000048e6.bin
016d153d1a649c07cc4e4aca70a3b2e2cef41bbebc326b5d46504bba80c36c02
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48E6 24200 bytes
font_01_sfnt_off00008028.bin
56403f5900f5bed6f390759505a3fc6b15ffcbe17753586a2227a8bdf26d7b19
pdf-font-stream PDF embedded font (sfnt) at offset 0x8028 18764 bytes