Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3652ed941f60550…

MALICIOUS

PDF

54.7 KB Created: 2021-09-24 10:21:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 119ccb2624144e11a984bff0c4f11c43 SHA-1: 4fcea092d3ffd2524ce2a1a5f2aa38c3d01e4ee5 SHA-256: b3652ed941f60550359515fce1ce971d53064eb89512640d296ec88796103315
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, many of which point to compromised WordPress sites or disposable hosting. These links are presented as a link farm, likely intended to redirect users to malicious content or downloads, as indicated by the ClamAV detection of Pdf.Phishing.Trojan. The embedded JavaScript suggests an attempt to execute malicious code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3186

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://laborke.ru/uplcv?utm_term=autocad+2017+key+generator+online PDF link annotation
    • https://www.ksmt.edu.np/assets/ckfinder/userfiles/files/34947446484.pdfIn PDF document text
    • http://geoass.eu/userfiles/files/74057308089.pdfIn PDF document text
    • http://betonkeritesek.eu/Content/files/86185750704.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/161407f921198d---xibaliza.pdfIn PDF document text
    • http://ecofincas.net/ckfinder/userfiles/files/80856682261.pdfIn PDF document text
    • https://semut73.com/contents/files/deserosurut.pdfIn PDF document text
    • http://n2nlah.org/UserFiles/file/84636201515.pdfIn PDF document text
    • http://infas.cz/images/wiswig/file/15289483210.pdfIn PDF document text
    • http://mlsy.cz/images/file/files/zenuzaguga.pdfIn PDF document text
    • https://riondene.ch/img/uploads/file/foseturefowasiruzarekose.pdfIn PDF document text
    • http://seamacros.com/upload/file/17995968585.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/boogln1adr09gi335olvh72ue3/48576075034.pdfIn PDF document text
    • https://landtop.com/filespath/files/20210923021649.pdfIn PDF document text
    • http://versobrokers.eu/userfiles/files/mubirobivowagume.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/16141117a3e2fe---mivasojizis.pdfIn PDF document text
    • http://www.trisad.kz/ckfinder/userfiles/files/47761135467.pdfIn PDF document text
    • http://unipsyclinic.com/userfiles/file/20210917161902.pdfIn PDF document text
    • http://tplustech.com/images/ckeditor/files/37001407140.pdfIn PDF document text
    • http://connectcontrol.net/files/userfiles/files/93843175601.pdfIn PDF document text
    • http://es-manzokudou.com/yamituki-n/uploads/files/valukajo.pdfIn PDF document text
    • http://wronba.com/uploads/wysiwyg/file/23670093497.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/709506f7093ba8d88725e64c8ab059fb/6925518145.pdfIn PDF document text
    • http://cnfgl.netsociality.com/upload/files/36104257156.pdfIn PDF document text
    • https://mama-light.net/business_school/uploads/file/80928871974.pdfIn PDF document text
    • http://classiccar-jp.com/js/upload/files/najetixilamevisi.pdfIn PDF document text
    • http://kechengchem.com/upload/files/64571519705.pdfIn PDF document text

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