Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b3e5136f86a02f7…

MALICIOUS

PDF

57.0 KB Created: 2021-06-03 13:53:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b0bf581316249bd85a9c564485178ce2 SHA-1: a6fc6123cf1854e37a84e25d7b6f3947ac2857bf SHA-256: 0b3e5136f86a02f7b8bbc7d60bc1ac1f918fb3755929d1baaad2f01f3833848f
184 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9099

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://krisoc.ru/pbw?utm_term=what+are+the+six+approaches+to+conflict+resolution PDF link annotation
    • https://gosibipidumoduj.weebly.com/uploads/1/3/4/3/134318513/xoruzugokazugol.pdfIn PDF document text
    • https://panodetis.weebly.com/uploads/1/3/4/6/134669877/3c75bf8e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380379/normal_606bd5891262c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494657/normal_60238340bcc60.pdfIn PDF document text
    • https://fozunisomizu.weebly.com/uploads/1/3/4/6/134666093/judude.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370791/normal_6001772e74b3c.pdfIn PDF document text
    • https://xisevulatunetu.weebly.com/uploads/1/3/4/5/134595014/pisoxowiguka.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410020/normal_5fd63b1a3026d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377388/normal_6062fb1bdc2b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402737/normal_604cb84829eeb.pdfIn PDF document text
    • https://jozegolufipiz.weebly.com/uploads/1/3/0/7/130776065/xotupan.pdfIn PDF document text
    • https://poriveba.weebly.com/uploads/1/3/4/3/134316211/mapolobidugodem.pdfIn PDF document text
    • https://tivifetanesa.weebly.com/uploads/1/3/5/3/135347176/3610f42e735f8c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410016/normal_6048610b27494.pdfIn PDF document text
    • https://nilezejexi.weebly.com/uploads/1/3/4/7/134737846/463f7ab7.pdfIn PDF document text
    • https://najilemizosi.weebly.com/uploads/1/3/4/7/134730194/mipelonag_nitakazajiw.pdfIn PDF document text
    • http://viluxese.pbworks.com/f/57930306757.pdfIn PDF document text
    • http://vugufosenene.pbworks.com/f/fekav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b066b7c-92d5-4ba1-9b1f-825151c022c5/drive_right_chapter_12_workbook_answers.pdfIn PDF document text
    • http://nagaxop.pbworks.com/w/file/fetch/144541608/netazukabanebe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22ecf0f8-caa6-42be-a55d-d46b8019333e/treasure_island_hardback_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/514cf378-8074-45c4-8f6a-08b5e5b21f0c/reformas_borbonicas_consecuencias_culturales.pdfIn PDF document text
    • http://bupataved.pbworks.com/w/file/fetch/144423726/homophones_lesson_plan_grade_4.pdfIn PDF document text