Malicious PDF — malware analysis report

Static analysis result for SHA-256 3798ddc2ad9dbad5…

MALICIOUS

PDF

70.6 KB Created: 2021-09-06 23:36:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 69a06727ffd4eb9f1d50eeba7237b387 SHA-1: 38026d926144006ec273deb03e33c17c77605cb7 SHA-256: 3798ddc2ad9dbad5525d102ebadf61ad21b00b1a61e5aa7289b8682570f0097a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier further support its malicious nature. The presence of numerous links suggests an attempt to lure users to external malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6717

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://www.vikingmaterials.com/img/lafategedufoporoxibok.pdf In PDF document text
    • http://ac-kenigsberg.ru/files/file/58831274332.pdfIn PDF document text
    • http://superfishinglewood.com/uploads/files/zigeninufibomowukosopobes.pdfIn PDF document text
    • http://ingenermarket.ru/userfiles/nesukogaro.pdfIn PDF document text
    • http://motolargo.pl/userfiles/file/69398097567.pdfIn PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608edb16bcaf5---21768235519.pdfIn PDF document text
    • http://thingsantiquesla.com/userfiles/files/15201786898.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/rv8dui66mlm6vppdip2da4aj61/digidu.pdfIn PDF document text
    • http://fuli-capital.com/userfiles/file/nevedubenun.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b51859ca62e---82401013887.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1609b42097bae5---nirurusuju.pdfIn PDF document text
    • https://lecormier-menuiserie.com/www/upload/files/xekokodivelafikepo.pdfIn PDF document text
    • http://bike-aholic.com/UserFiles/file/75250668938.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e168f395a9.pdfIn PDF document text
    • http://women-for-marriage.com/ckfinder/userfiles/files/75778555067.pdfIn PDF document text
    • https://yildizwebpaket.com/calisma2/files/uploads/50836812653.pdfIn PDF document text
    • http://bkdesign.ee/userfiles/file/76972218797.pdfIn PDF document text
    • http://mofrantech.com/userfiles/file/lotomodanex.pdfIn PDF document text
    • http://lienming-rubber.com/uploads/files/202108140705425897.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/1611a055f24f93---zaxadekurowakizidek.pdfIn PDF document text
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/5etbjiosncrjd9tfp5amb1rrql/32293709993.pdfIn PDF document text
    • https://mcq-exambd.com/app/webroot/ckfinder/userfiles/files/wusoxilopavuwu.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a6ad64a3475---64209107992.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075b813dde0f---69043026755.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=classroom+commands+pdfPDF 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_off0000ec97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC97 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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