Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb22b43377e934f5…

MALICIOUS

PDF

65.1 KB Created: 2021-09-02 05:31:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: a5f6304dce01eedeebe1e6406f4fa9ee SHA-1: 70deb405f424eaaf9c91d6755d71e6e0584780e7 SHA-256: bb22b43377e934f5c1effa1cf29b9597956fa4bc8af06f2a7baea63409118768
154 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, indicating it functions as a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of multiple links to compromised CMS uploads reinforces this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9582

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://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/80bf69fc8b26d33999a2ecb2fad063cd/nulono.pdf In PDF document text
    • https://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/h5degvngqmmadm9n6kjr7fh7rs/velokimafalifomo.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/b5dbf572b475497addd2f0705aa5e2d8/zuzawojijogawonovor.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e20ad2f8e1---40442506278.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611400d747c0e---pilepazaxotupazufu.pdfIn PDF document text
    • http://www.sport-konyv.hu/userfiles/file/titaxiwezemugarijixevul.pdfIn PDF document text
    • https://www.southdownscellars.co.uk/ckfinder/userfiles/files/matizenediper.pdfIn PDF document text
    • https://www.ojchamber.com/ckfinder/userfiles/files/boxixosonajediraguwi.pdfIn PDF document text
    • http://csc0898.com/userfiles/file/20210714094747_by2h42.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/00e87d888c5971f82283f0c8fedb45e6/48367275893.pdfIn PDF document text
    • https://megashina24.ru/files/files/dazebemojirapi.pdfIn PDF document text
    • http://kameleonhastanc.hu/files/file/xorenid.pdfIn PDF document text
    • https://briljant-maleri.se/UserFiles/files/22528943910.pdfIn PDF document text
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/48ebbd00a227e235af4dc7443779d56b/kufigowuxijagajagaz.pdfIn PDF document text
    • https://mastirz.com/userfiles/files/lazepezemetufapel.pdfIn PDF document text
    • http://mldinsaat.com/image/files/lofejowulotubakora.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf128444575---52902439850.pdfIn PDF document text
    • http://brcassociati.com/userfiles/files/guwexe.pdfIn PDF document text
    • http://e-district.org/userfiles/file/46245425945.pdfIn PDF document text
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609185b6115b9---zetuviluwugufaximivu.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a86695589ee---gotofujumotusatamanitefi.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/661a357744c147d90a5a9e6b3f7a0ca0/lizave.pdfIn PDF document text
    • http://lifemartrealestateconnect.com/wp-content/plugins/super-forms/uploads/php/files/nsm3ko9hhjpvk9aigj92manjs7/80379944494.pdfIn PDF document text
    • http://eastindiaspray.com/suvra/eastindia_spray/files/1726796371.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=today+kick+offPDF link annotation
    • http://forum-auto.ru/data/files/12742186065.pdfIn PDF document text

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