Malicious PDF — malware analysis report

Static analysis result for SHA-256 10fb8016c7b0f98d…

MALICIOUS

PDF

58.2 KB Created: 2021-03-06 23:01:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 9486d71c139db85645ce5dc804a0913b SHA-1: 1c8660f1ee12f71b6b2e52406d529763a3900371 SHA-256: 10fb8016c7b0f98d5d9d1c476dd820573089cda29deaf0953719dcc5e9f2447e
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or phishing operation. The primary malicious URL identified is https://pelibifir.ru/strik?utm_term=ti+34+multiview+calculator, which is likely used to redirect users to malicious content or further stages of an attack. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8425

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://pelibifir.ru/strik?utm_term=ti+34+multiview+calculator PDF link annotation
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    • http://sizoxuk.22web.org/what_year_did_a_river_runs_through_it_come_out.pdfIn PDF document text
    • http://okrasote.info/141862152452ldlk.pdfIn PDF document text
    • http://the-job.ru/496593536108e4aq.pdfIn PDF document text
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    • https://dowazulipogopu.weebly.com/uploads/1/3/4/3/134322731/1e261b0954.pdfIn PDF document text
    • https://kipejuxi.weebly.com/uploads/1/3/2/6/132682137/burojavevurovomuwoge.pdfIn PDF document text
    • https://rawuvuxa.weebly.com/uploads/1/3/4/0/134019107/piwebamezuze.pdfIn PDF document text
    • https://vokefuda.weebly.com/uploads/1/3/4/7/134709273/dumow_basitowosujaz.pdfIn PDF document text
    • http://shoop-fp.ru/sesevogavul0jdd.pdfIn PDF document text
    • http://semengergel.ru/2004_honda_civic_ex_maintenance_required_light_resetorvpq.pdfIn PDF document text
    • https://pebajubidu.weebly.com/uploads/1/3/1/3/131383648/xifamezotagof.pdfIn PDF document text
    • https://rodedewosesuge.weebly.com/uploads/1/3/6/0/136010241/8381987.pdfIn PDF document text
    • https://femodamokej.weebly.com/uploads/1/3/4/5/134529999/2601673.pdfIn PDF document text
    • https://zomimodobi.weebly.com/uploads/1/3/0/7/130739583/1046738.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a9bc5f7-4b85-4991-a4c9-7fe5151338c2/49936426770.pdfIn PDF document text
    • https://b84c3727-5d5a-4c5d-9d5d-21cac87b3a69.filesusr.com/ugd/fdd6c2_cd30eaa6f06841d6aa5c305f1a7039aa.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5c60354-f724-4317-b353-718cb9c7a7d7/timowubuwonigin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/391e094a-9ac8-4783-9f7c-91753c4b9e1e/2611170171.pdfIn PDF document text
    • http://zemesimeboxi.epizy.com/que_se_necesita_para_ser_anestesiologo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a07bde65-cb0e-4394-a080-3fda224b3ea3/xuxojasog.pdfIn PDF document text
    • http://bikemeno.rf.gd/sapus.pdfIn PDF document text
    • https://2a4c341d-9af7-4f89-b48a-1b926ad6ced7.filesusr.com/ugd/dd6616_d6960a50f39b4afabfa584b6177a8c55.pdf?index=trueIn PDF document text
    • https://11ca5eb4-0abe-4d5d-8073-3f36f6088e80.filesusr.com/ugd/8b62d8_22073798f221492e8822a6175b84cbf6.pdf?index=trueIn PDF document text