Malicious PDF — malware analysis report

Static analysis result for SHA-256 955f998339c36cc5…

MALICIOUS

PDF

52.1 KB Created: 2021-06-22 13:18:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 351205bf655847f1d189265f8f8f0b85 SHA-1: 5cc02e4678b4d4ca7eeecc5883758c8d0a245f14 SHA-256: 955f998339c36cc5de4db8aa161e3855eb7f0f037878d525734a0d7336ba9910
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting a link farm designed to redirect users. The ClamAV detection and ML classifier indicate malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attack pattern involving redirection to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7149

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 http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1607f7c0430179---58466504051.pdf In PDF document text
    • http://eastmoorclassof1970.com/clients/4/43/4343e427eb1b0a0668350338a4d6b623/File/manebajuputavepol.pdfIn PDF document text
    • https://dcoderesearch.com/uploads/57029982610.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/3j7bcbd07iju21fgqtcdeah2vo/vitusitubak.pdfIn PDF document text
    • https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/fddf0fcd01b2be52ec01e5bb5804eea3/wekomupowelukasonivini.pdfIn PDF document text
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/93e6bd377243beff9146753d286036d6/nizisovipijujefukemidub.pdfIn PDF document text
    • http://whalesart.com/uploadfile/file/%5C/2021060702034853.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c32bddd5637---sipaxufivowevibim.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/3f76f2bc6079a6435a720483c8b85d59/pebujisizomabapul.pdfIn PDF document text
    • http://tradeweb.es/userfiles/file/linuvupe.pdfIn PDF document text
    • https://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/030pvvah0gqi3ad9o0ljonh1s4/19234619145.pdfIn PDF document text
    • https://robotics-institute.com/wp-content/plugins/super-forms/uploads/php/files/dgced2ujdngfatoaq8rra0qu2b/48116813483.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/f8bf4ee63d35547409905358d58de7a8/bibuzamuxakutuzopixeniji.pdfIn PDF document text
    • https://mwasafat.com/uploads/files/davozotiwedadalagawolujek.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/dv4e8sfjucs7l48ovhokbjdtq0/xenefukixixixijuguwen.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=find+vin+number+by+platePDF link annotation

Related samples 8

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