Malicious PDF — malware analysis report

Static analysis result for SHA-256 1eb9f05bf791a4a0…

MALICIOUS

PDF

37.8 KB Created: 2021-08-31 09:26:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 6be23766c2de951792561fa43c4a5b5c SHA-1: 2dd6792bece8802d179b8a40a3a6b820b2694205 SHA-256: 1eb9f05bf791a4a0e8095a64eaf2e19da99bd8a2841d63e351b4c52989771a77
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF exhibits characteristics of a phishing lure, using an image-only design to hide clickable links. Multiple heuristics indicate it's part of a link farm hosted on potentially compromised or disposable domains. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to redirect users to malicious content or initiate further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7855

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 37 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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 http://cdmvt.cz/sites/default/files/87046981930.pdf In PDF document text
    • http://synthecinter.com/userfiles/files/biroxunaveran.pdfIn PDF document text
    • http://cn-junsheng.com/upload/file///2021713224677517.pdfIn PDF document text
    • https://ht-cooling-j3t.com/contents//files/93996988161.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/1d4244f9bceb49c16b675936aab29a66/19902830706.pdfIn PDF document text
    • https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/55bbf57748b71d9c7724a2ebce2bd69c/kanegeju.pdfIn PDF document text
    • https://spbmworld.com/anaeter_capital/siteadmin/userfiles/files/53510349040.pdfIn PDF document text
    • http://tafgambiatours.com/userfiles/file/83526225437.pdfIn PDF document text
    • http://webursitet.org/Files/file/45985974948.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/76121cfa8ee62b42a7a183b7a0c7d56d/7610874067.pdfIn PDF document text
    • http://www.srijonihealinghome.com/fckimagIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=law+of+attraction+369+manifestationPDF link annotation

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