Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7eee8ff18436bf4…

MALICIOUS

PDF

62.5 KB Created: 2021-05-29 02:48:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: a8f00f53592cc8f60ecfb969ba90e7e0 SHA-1: dddf85280fe898e315f07dc7d0d87dd5431c05a4 SHA-256: e7eee8ff18436bf4a43f7abe96b47cc66d04bac4994368e2de12283da922d71b
242 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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 and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5491

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/strik?utm_term=solicitud+de+empleo+econo+pdf In PDF document text
    • https://static.s123-cdn-static.com/uploads/4366347/normal_60081fe81c155.pdfIn PDF document text
    • https://magijomolalol.weebly.com/uploads/1/3/1/4/131437319/1316184.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421036/normal_5feef4c633119.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365662/normal_6030590e09cb2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371808/normal_5fce9509d568a.pdfIn PDF document text
    • https://dekilaroturiti.weebly.com/uploads/1/3/1/8/131856809/4002015.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372967/normal_6041206e34481.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490539/normal_605ee55063726.pdfIn PDF document text
    • https://tejigenunonim.weebly.com/uploads/1/3/0/8/130813632/baxuw-vipidetirasa-naligovugeli-gajabolevifemo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465252/normal_6025019844fc1.pdfIn PDF document text
    • https://makigutezun.weebly.com/uploads/1/3/4/7/134707077/4935044.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421767/normal_603b759ab4a82.pdfIn PDF document text
    • https://xojefuwi.weebly.com/uploads/1/3/4/6/134630926/wixudawel-melafaxe-fotejowosujotan-merejugaxa.pdfIn PDF document text
    • https://rigavimiba.weebly.com/uploads/1/3/0/8/130814992/xojufi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452382/normal_6047caa737abb.pdfIn PDF document text
    • https://nolutoxut.weebly.com/uploads/1/3/4/6/134683805/c72ef85d4.pdfIn PDF document text
    • https://lonunupamazukev.weebly.com/uploads/1/3/4/7/134711915/rurajabatinoso_tomakuveveg.pdfIn PDF document text
    • https://zuvigopujipo.weebly.com/uploads/1/3/0/9/130969218/4381798.pdfIn PDF document text
    • https://vosefeluvem.weebly.com/uploads/1/3/5/3/135382784/xuxibikonemok.pdfIn PDF document text
    • https://removevas.weebly.com/uploads/1/3/4/4/134443453/a5634.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/755ebbdd-6057-4f64-9b4a-866c8066c927/94298699684.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc30b9f2-a8b3-4bd2-8452-bbad1c5e4c21/is_harry_potter_and_the_cursed_child_coming_out.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb132b79-a237-4a3e-8c11-61d9c39f356e/vabab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb749b59-8046-4f5b-9167-61848065a589/buzizuzewewemigirazubefu.pdfIn PDF document text