Malicious PDF — malware analysis report

Static analysis result for SHA-256 282fc782c0e824b9…

MALICIOUS

PDF

104.9 KB Created: 2021-09-21 15:06:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 5fe147b1a79c3969b35a601831ef8e10 SHA-1: abaca1f4b07b6487ac25ec28d18a2748e22e729c SHA-256: 282fc782c0e824b9a957d824b99bea38c344b60db2ace9b9c7e58421c86edd69
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and numerous external URIs, many of which point to disposable domains. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a link farm designed to obscure the true destination, likely a phishing or malware download site. The ML classifier and ClamAV detection strongly suggest malicious intent, consistent with a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7611

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://sva-jeanroze.com/xmedia/file/24358835423.pdf In PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16146365c84fe8---rixafiruve.pdfIn PDF document text
    • http://blow-w124.com/js/upload/files/6713596782.pdfIn PDF document text
    • https://emailchopper.rockeit.com/userfiles/file/70265222475.pdfIn PDF document text
    • http://train-in-japan.com/images/blog/file/4285703983.pdfIn PDF document text
    • http://rent2day.ca/ci2/userfiles/files/38006625852.pdfIn PDF document text
    • http://thibidi.vinadesign.info/uploads/images/files/pimulaxozolaxidek.pdfIn PDF document text
    • http://letsfinal.com/userfiles/file/mafemekevuxilenenip.pdfIn PDF document text
    • https://sskundal.com/userfiles/file/71304755106.pdfIn PDF document text
    • http://mylivediamondinventory.com/uploads/files/mofododixogijotimekora.pdfIn PDF document text
    • https://delphin-restaurant.com/ckfinder/upload/files/kajozix.pdfIn PDF document text
    • https://nsck-cykelmotion.dk/ckfinder/userfiles/files/73154198891.pdfIn PDF document text
    • http://letnipohar.cz/upload/file/65011092754.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/dfc52aaaa0b3d45e15998151e831efee/36411155062.pdfIn PDF document text
    • http://gwardiajuvenia.pl/zdjecia/fck/file/59329292040.pdfIn PDF document text
    • http://allivecoat.com/userData/board/file/22521808009.pdfIn PDF document text
    • http://karate-talence.com/newsite/userfiles/files/32941259387.pdfIn PDF document text
    • http://movitecnic.com/ressource/site-image/files/xapilowotu.pdfIn PDF document text
    • http://soldearenales.com/galeria/files/54606246278.pdfIn PDF document text
    • http://tsrmmessina.it/userfiles/files/veduzisixu.pdfIn PDF document text
    • https://gencshoworganizasyon.com/upload/ckfinder/files/wenafusawa.pdfIn PDF document text
    • http://hoteldarim.ir/basefile/hoteldarimir/files/rojaro.pdfIn PDF document text
    • http://geyikkimya.com/userfiles/upload/file/29747888708.pdfIn PDF document text
    • http://debnine.net/UserFiles/File/wisilenigajun.pdfIn PDF document text
    • http://jj-metals.com/userfiles/file/2021091412224373499.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=samsung+galaxy+grand+prime+update+software+free+downloadPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018a9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18A9B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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