Malicious PDF — malware analysis report

Static analysis result for SHA-256 a45c76453b8f755d…

MALICIOUS

PDF

42.9 KB Created: 2021-03-21 00:43:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: b4f3d2f6e2bd0a8d6a4756ecef8c64e8 SHA-1: fb8d117b96a8c0e3a555247e226eb3e5977ed112 SHA-256: a45c76453b8f755d3907c0be60b78baf26dca4d1da8ca5eddd266a5bc828691a
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs point towards an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9454

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://resalured.ru/award?keyword=list+of+anticancer+drugs+pdf PDF link annotation
    • http://juwoniki.getenjoyment.net/99434655387.pdfIn PDF document text
    • http://pejokepi.mywebcommunity.org/34428376966.pdfIn PDF document text
    • https://basupetuwesaf.weebly.com/uploads/1/3/0/7/130739706/xajavasike_kanomin_muwixoponuxuj_ruwewekuxa.pdfIn PDF document text
    • https://cdn.sqhk.co/wubunepan/X3jaxrZ/wusomawejimunef.pdfIn PDF document text
    • https://cdn.sqhk.co/kufomopinu/PiejbL5/85348592981.pdfIn PDF document text
    • https://rarasaxemog.weebly.com/uploads/1/3/4/6/134611000/lakexonegide.pdfIn PDF document text
    • https://cdn.sqhk.co/givifevulo/PMghjhP/26025056066.pdfIn PDF document text
    • https://cdn.sqhk.co/dinigivo/agdjbgf/your_guide_careers.pdfIn PDF document text
    • https://cdn.sqhk.co/siwowoso/ncLlMh2/7996636681.pdfIn PDF document text
    • https://mujesazuf.weebly.com/uploads/1/3/2/3/132302915/c0ea1fdfb.pdfIn PDF document text
    • https://cdn.sqhk.co/vavetiset/fhcNOhg/command_prompt_windows_10.pdfIn PDF document text
    • http://sadinexiwa.mygamesonline.org/3836938471.pdfIn PDF document text
    • https://cdn.sqhk.co/jeforije/hd2ia66/52202300200.pdfIn PDF document text
    • https://0ca3454e-05ac-49fc-8d00-644b1af7be3c.filesusr.com/ugd/8bf3fc_4780bf09da9c4afca2147593712ec724.pdf?index=trueIn PDF document text
    • https://1b3fde16-7575-45ba-b40e-8916c64185ca.filesusr.com/ugd/8874e8_8e22169abd8d4c08976e78c5d415db34.pdf?index=trueIn PDF document text
    • http://vilepobafomunow.atwebpages.com/tcp_ip_guide.pdfIn PDF document text
    • https://3dcfbd4a-ef33-49dc-a04a-0aaf5307c30d.filesusr.com/ugd/b47706_7a6e0a4be6fa4e749c7b80a476e10ea3.pdf?index=trueIn PDF document text
    • https://9de673a2-3b8e-40eb-bbf5-c0ad8e71a3da.filesusr.com/ugd/bd5c68_12b0c57e8b2f4be1a4d355422db94c48.pdf?index=trueIn PDF document text
    • https://a4edf7fa-b057-49b5-8014-e5fd436fbef3.filesusr.com/ugd/c8b2c5_ee61e2ca81344493b93d4a0bd565ab29.pdf?index=trueIn PDF document text