Malicious PDF — malware analysis report

Static analysis result for SHA-256 284dced7700c7b7b…

MALICIOUS

PDF

62.3 KB Created: 2021-07-08 05:28:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: db9a67560da80ffa72b2e774f72a58a5 SHA-1: b5b7216282b3c49d5bcd199200be509a4f2d7525 SHA-256: 284dced7700c7b7bd097e9dc343a8f7d9748032a38a6cd5e83f3e62197e094e5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, suggesting it's part of a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier indicate a high likelihood of malicious intent, specifically phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5915

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://drafthe.ru/uplcv?utm_term=the+song+of+the+lark PDF link annotation
    • http://english-life.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160710de0af6a9---niwifakabilorasibasaxo.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1607fe822b32ab---88720178239.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607446ec2e2cc---sufamuditinibukosowu.pdfIn PDF document text
    • http://ahs1978hounds.com/clients/0/09/09313dc2b2b2138818c22350edca9cf7/File/bajikagatatex.pdfIn PDF document text
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7b0e20e66d---86741493968.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/a3d38d7e298a271418e525a2ac654156/61459389267.pdfIn PDF document text
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/160876ff14deb4---givutilomoxevarekafaxi.pdfIn PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/051c0d926a8a26988a76ac0b37d3d15d/32501167086.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfd392dc86f---28222157818.pdfIn PDF document text
    • http://vladjurnalist.ru/archive/file/13138553111.pdfIn PDF document text
    • https://szekszardportal.hu/userfiles/file/varejaja.pdfIn PDF document text
    • http://accomplishtheimpossible.com/userfiles_ati/file/peludesamuzudufisitajax.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160762085927a6---80510395370.pdfIn PDF document text
    • http://lhsclassof68.com/clients/73441/File/11187718978.pdfIn PDF document text
    • http://poltinik.ru/userfiles/file/51130366591.pdfIn PDF document text
    • http://cdseoulps.com/uploadfile/fckeditor/file/48044177208.pdfIn PDF document text
    • https://alternativecarrepair.com/userfiles/file/31083147342.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c99fb5d55eb---vofududazirukuj.pdfIn PDF document text
    • http://www.agenbenangbandung.net/file/tukizekaxuzisepexeme.pdfIn PDF document text
    • http://hykylalumni.org/userfiles/rozakuwo.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/tagovowatajudadetizoto.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/20cbb66af674614639aa087ef29cefad/bosuvivuv.pdfIn PDF document text

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