Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b284d98eb72c8a2…

MALICIOUS

PDF

51.2 KB Created: 2021-08-17 02:56:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 2cfb3a31c53f917e87cfff778a3b9256 SHA-1: 515cdad5b869695244e45de39c8c5bbd0784909b SHA-256: 4b284d98eb72c8a267823274b5f5b7d218c6f927e01ee36d8a820b7119548af7
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple heuristics, including a machine learning classifier and ClamAV, indicating malicious intent. It contains numerous embedded URLs that point to external, potentially malicious sites, classifying it as a link farm. The presence of these links suggests the document's primary purpose is to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7185

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://laborke.ru/uplcv?utm_term=is+the+tesla+truck+full+electric PDF link annotation
    • http://bvsaigonbinhduong.vn/uploads/files/boxulanowusugariku.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608c18bedc7d8---pepukodiwawalizumebiwovak.pdfIn PDF document text
    • http://tfh-filter.hu/_user/file/41012263333.pdfIn PDF document text
    • https://doosradashak.in/ci/userfiles/files/jijiwodosegebipi.pdfIn PDF document text
    • https://samsunyapi.com/userfiles/files/25250617470.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/160778367e9ebc---pugewezajavixateva.pdfIn PDF document text
    • https://oriontradecom.com/ckfinder/userfiles/files/warefob.pdfIn PDF document text
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/160835512b2120---66316114907.pdfIn PDF document text
    • http://podiummoda.ru/userfiles/file/wuserifiladune.pdfIn PDF document text
    • http://pivotal-technologies.com/userfiles/file/51331248101.pdfIn PDF document text

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