Malicious PDF — malware analysis report

Static analysis result for SHA-256 f12e8a6367f99600…

MALICIOUS

PDF

35.0 KB Created: 2021-06-19 05:18:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: b6d26687f1e4d5acdcb4a123908ccb79 SHA-1: 06f290cfee46b3517d03b862bfc65f7e220a8d79 SHA-256: f12e8a6367f99600bef664ea3e737d99027a5035ef551b97b5ca7b75911ef136
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a direct link to malicious infrastructure, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body also contains text related to hacking and game exploits, further suggesting a malicious intent. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern involves directing the user to a malicious URL, likely to download further malware or conduct a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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 http://netcdn.co/app/431946152/hack-people In PDF document text
    • https://encounternepal.com/userfiles/files/free-spin-coin-master-app-download_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/supreme-roblox-t-shirt-free_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/roblox-bloxburg-hack_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-spin-online-tool-coin-master_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/minecraft-pe-hacks_GM479516143.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/minecraft-windows-10-edition-free_GM479516143.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-robux-with-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/is-coin-master-hacks-safe_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/daily-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-robux-quiz_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/minecraft-hack-app_GM479516143.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-minecraft-java-account_GM479516143.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/ways-to-earn-robux_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-minecraft-java-edition-account_GM479516143.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-minecraft-survival-server_GM479516143.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/pubg-uc-rate-in-pakistan_GM1330123889.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/how-to-get-coin-master-free-spins-in-email_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003050.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3050 22424 bytes
SHA-256: e1979bf07913b699cb09a410a5c73229720794f882ff8ad94b17f4ccc30b2698
font_01_sfnt_off0000624c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x624C 19468 bytes
SHA-256: abf5cab39a5d21288728d91b50ab43393707c8eeb029f86a58f78515a9e7ebdf

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