Malicious PDF — malware analysis report

Static analysis result for SHA-256 19ceea664964fd0b…

MALICIOUS

PDF

51.1 KB Created: 2021-07-16 14:43:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: a73c36a452aaa925af086a37ccdfc338 SHA-1: 45e4bb0ce51909fb01144e6531edd2d78e8e4932 SHA-256: 19ceea664964fd0bf4c1113ae78949bdcc24f986f08506911e477c1c6eecb8ea
154 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised WordPress sites, which in turn host other malicious PDFs. This suggests a phishing or malware distribution campaign. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6227

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/b40c9b402e29ccb79728b7a3c3f13757/tedefawim.pdf In PDF document text
    • https://guapa2.com/admin/fck/file/gorulonigo.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab4492af0f4---95749028019.pdfIn PDF document text
    • https://muacash.com/webroot/img/files/21462793139.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/2fcd04a84057392eb281aefe47ee11e8/33582148953.pdfIn PDF document text
    • http://bukharasuwanee.com/sites/default/files/file/bimefafurovifijipinu.pdfIn PDF document text
    • https://absoluteanytime.com/media_file/files/files/fukikobofuwitogawisuga.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/82ud0l0ofdhgmabip7ujtoapd6/borigipa.pdfIn PDF document text
    • https://grandplaza.bg/uploads/assets/file/77115970242.pdfIn PDF document text
    • https://doctornhospital.com/banglanews24/editorsfiles/files/reloloj.pdfIn PDF document text
    • http://m3hotels.com/userfiles/file/gudidimowofejupa.pdfIn PDF document text
    • http://dfh-consulting.com/userfiles/file/71306302967.pdfIn PDF document text
    • http://allasclub.com/campannas/file/30013090597.pdfIn PDF document text
    • http://angarakshaksecurity.com/userfiles/file/kolagajadivetorudatun.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f2221bfae4---fukajuvetutol.pdfIn PDF document text
    • http://mg001.cn/upload_fck/file/2021-7-14/20210714104625335319.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606d084b4f316---zabufesadutelepazel.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b276d05c4a3---55295507833.pdfIn PDF document text
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160864d7206bec---jekovakuzakut.pdfIn PDF document text
    • https://comfortinnbarrie.com/phpsites/vertical_living/uploads/file/4663767653.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1608b24fdeb989---lurixisenunilezejig.pdfIn PDF document text
    • http://brandnewgoods.net/userfiles/file/paxorolazetepilolawomu.pdfIn PDF document text
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/2n956l69iekjiv20i1ucfk55ji/61248027575.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=trumbull+board+of+education+meetingPDF link annotation

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