Malicious PDF — malware analysis report

Static analysis result for SHA-256 549f3b2a517268d9…

MALICIOUS

PDF

79.5 KB Created: 2021-09-08 06:26:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: bd63f97b9baba3f2d147c61433031fe4 SHA-1: a3ae7847e870062e24389edbe04cbbc9ca18d36a SHA-256: 549f3b2a517268d9226a297f133296751ab9308d3e054a089a36118b854ee49f
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and contains numerous embedded URLs pointing to compromised WordPress upload directories and other potentially malicious sites. The PDF's structure suggests it functions as a link farm, likely designed to redirect users to phishing pages or download further malware. No scripts were extracted, but the presence of multiple compromised links indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier clean score 0.2479

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 https://lightingsystemscol.com/wp-content/plugins/super-forms/uploads/php/files/7bf60a83f27b63dff020ccd294a155d3/jipafejiwi.pdf In PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607752274c1ae---jewamuwonudedabegawevif.pdfIn PDF document text
    • https://advik.net/userfiles/file/dafobugafetibonowonusibuk.pdfIn PDF document text
    • https://timjanen.se/anvandarbilder/53/files/57937347652.pdfIn PDF document text
    • http://kenshopvn.com/uploads/files/zufenedunavuni.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/2osqg32csoitchdgfaaieph2u0/47208145602.pdfIn PDF document text
    • https://stollerco.com/testingsites/advantage_aviation/assets/media/file/11334535206.pdfIn PDF document text
    • http://blissrenewbeauty.com/newerac2c/userfiles/file/dimifetumepuzokakaf.pdfIn PDF document text
    • https://delcinfo.ru/img/files/files/mefumiworevozi.pdfIn PDF document text
    • https://maggievanostrand.com/uploads/media/file/22953300145.pdfIn PDF document text
    • http://asea-admin.com/_userfiles/file/20210627145112.pdfIn PDF document text
    • https://megatekspb.ru/sites/default/files/uploads/5430217309.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/b581d2953de6f44ad260fd8dc2be23c6/51585430477.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/b61928c435259f021a5546361d9c7ade/zetomanasatinaze.pdfIn PDF document text
    • http://www.asslar.de/downloads/42568084272.pdfIn PDF document text
    • http://guchen.ru/d/files/7534455228.pdfIn PDF document text
    • https://btsis.com/upload/ckfinder/files/fimijel.pdfIn PDF document text
    • http://findmecakes.com/userfiles/files/99978588560.pdfIn PDF document text
    • http://shadesvalleymounties1969.com/clients/868959/File/97821157509.pdfIn PDF document text
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/160dc3a39f0643---sebaronofazuxezexizu.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c07a1d3839c---bituvajagatavuza.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b0eb2d8d91---18992930848.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095b2202144a---vufefujetadolako.pdfIn PDF document text
    • http://dyglas.com/userData/board/file/mejemifetok.pdfIn PDF document text
    • http://imaginove.eu/data/Files/memizuvifeno.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/cp3gtjekh63ctmk689e0okblt6/pedigukoperuvorivirowuv.pdfIn PDF document text
    • https://daxitrip.com/basefile/daxitripcom/files/90324362538.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=laterite+soil+engineering+gidigasu+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA8D 18156 bytes
SHA-256: d871ee682a38289eee5158e33620449dceaf5f7145e588a06d2b75ab362735cf
font_01_sfnt_off00011901.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11901 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1