Malicious PDF — malware analysis report

Static analysis result for SHA-256 a46a0bd326945e37…

MALICIOUS

PDF

74.7 KB Created: 2021-09-08 00:26:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 114163fae9eedb48851a656934337cf5 SHA-1: a71ff48c155acf07fdeeab9588567d0081f52e3c SHA-256: a46a0bd326945e3746d0d1d520709f982dae52aaefdd00cbdc0050c779cf9872
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links, many of which point to compromised WordPress sites and other disposable hosting. This behavior is indicative of a link farm designed to distribute malicious content or phish for credentials. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment. No scripts were extracted, but the structure suggests it's intended to lure users to external, potentially malicious, sites.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4683

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://astorandblack.net/emailer/userfiles/file/80278879633.pdf
    • http://ourjamesfamilyhistory.com/clients/1/14/146a9f92d0a296c7c29e793db058bb30/File/setipipipebemama.pdf
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082d2bcbbddf---70965014415.pdf
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1606d873543ff0---vidupepaviwotopelobesosim.pdf
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/noth8nstgfg9cipbcjq2aghekh/safutupijufojotudizuwubi.pdf
    • http://wwpokebar.com/uploads/files/vafigavubapademudoku.pdf
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/597dce10ca9e2b82af5a17d8d59e05df/xiforudofesiwamazib.pdf
    • http://1-cx.com/ckfinder/userfiles/files/wogigubedufo.pdf
    • http://lucann.com/Upload/file/dizaxutuwob.pdf
    • http://ipceurope.com/assets/file/kuwosafa.pdf
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/1ac1b130e087dd5117da5d7350d8e443/57021019159.pdf
    • http://hndgyl.com/v15/Upload/file/202162082364524.pdf
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/km1mtd071537rtk1ct2el354e4/dilawufevoxi.pdf
    • http://sanzmendia.com/userfiles/files/1844949043.pdf
    • http://interstroy96.ru/uploads/files/9448823950.pdf
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160940f4952408---77738649466.pdf
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/16073712c66aa0---rezirubatosopigedolodose.pdf
    • http://www.me.ntou.edu.tw/ckfinder/userfiles/files/20210825_040557.pdf
    • http://lawyerstitleescrow.com/clients/9/9b/9b7cfcecb5e5abb6b877b2b1d59b4eb1/File/45658199890.pdf
    • https://aimhc.com/userfiles/file/39712613602.pdf
    • https://asiastudy.in/ckfinder/userfiles/files/fesotofofewafefi.pdf
    • http://sirmamedia.com/ckfinder/userfiles/files/jaxivotofiruv.pdf
    • https://vanrun-it.nl/userfiles/files/29961654735.pdf
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/bb5da3be5ef8c02340d3e586c39cd1e8/sajotumokebobuduramok.pdf
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/11e2d0c0f8e5ed104e7c0dcd3cbb3744/buwegose.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=quantitative+analysis+techniques+pdf
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0a4.bin
43fa2cf5190740fb47770d1a7eb2e74a7df55880f8e1befdf7e40ab8a7cd6072		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE0A4 10980 bytes
font_01_sfnt_off0000f9fd.bin
20f8068c303b3e2abab9721a006a3ad321f01e82246fccc5f0ee7f95b0abf265		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9FD 17376 bytes

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