Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f1c945bb69881d1…

MALICIOUS

PDF

52.4 KB Created: 2021-02-15 22:44:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 1fc59024aa04412a0c50d8db74610718 SHA-1: eb2263d234e82b3473a1d74a8de80ab874a27888 SHA-256: 5f1c945bb69881d189fb3bd0f5156177e5df019e88d0fb26a08316e746114601
184 Risk Score

Malware Insights

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

The PDF file contains a large number of external links pointing to other PDFs hosted on disposable domains, a technique often used for SEO manipulation or to distribute malware. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or trojan distribution. No scripts were extracted, but the structure suggests the document's primary purpose is to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7317

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
  • 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://maypoin.ru/strik?utm_term=the+endless+summer+2+dvd PDF link annotation
    • https://sukodijam.weebly.com/uploads/1/3/4/5/134516983/1014669.pdfIn PDF document text
    • https://fagutefoxod.weebly.com/uploads/1/3/4/2/134235025/c087c.pdfIn PDF document text
    • https://kodejisejawap.weebly.com/uploads/1/3/2/3/132302923/fuxovirute_doxisaseni_tadatap.pdfIn PDF document text
    • https://fewefemuge.weebly.com/uploads/1/3/4/3/134372507/adbd8ae0.pdfIn PDF document text
    • https://lumovomudin.weebly.com/uploads/1/3/4/7/134704265/56041d9ab3dc6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457847/normal_5fce5bdb6163c.pdfIn PDF document text
    • https://worubagazew.weebly.com/uploads/1/3/4/6/134639575/9408a402c22.pdfIn PDF document text
    • https://ruzutemeba.weebly.com/uploads/1/3/2/6/132681300/kogotadesap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370529/normal_601709848f3bc.pdfIn PDF document text
    • https://bugotenopiziwa.weebly.com/uploads/1/3/0/9/130969298/3245598.pdfIn PDF document text
    • https://sizelelam.weebly.com/uploads/1/3/4/8/134867910/5164474.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413125/normal_60282e3dadee2.pdfIn PDF document text
    • https://vomudata.weebly.com/uploads/1/3/2/7/132740307/vagosagunafon_jipamivokepef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495707/normal_5fe777dfef244.pdfIn PDF document text
    • https://wuporebepumi.weebly.com/uploads/1/3/5/9/135981990/3276242.pdfIn PDF document text
    • https://volifutizur.weebly.com/uploads/1/3/4/6/134602954/25b24068ef.pdfIn PDF document text
    • https://denimuka.weebly.com/uploads/1/3/4/5/134582609/1789964.pdfIn PDF document text
    • https://lufaranari.weebly.com/uploads/1/3/4/6/134689474/favawi_kefekazad.pdfIn PDF document text
    • https://wefogazasu.weebly.com/uploads/1/3/4/8/134880183/9572923.pdfIn PDF document text
    • https://wubepifumemav.weebly.com/uploads/1/3/4/1/134109226/d92a3e24.pdfIn PDF document text
    • https://vawosikajoj.weebly.com/uploads/1/3/1/4/131438279/safaregowusimo.pdfIn PDF document text
    • https://vasalidut.weebly.com/uploads/1/3/0/9/130969475/5715497.pdfIn PDF document text
    • https://wunepilupizuxo.weebly.com/uploads/1/3/1/8/131857535/wezapomanipukelos.pdfIn PDF document text
    • https://pesadosopovito.weebly.com/uploads/1/3/4/2/134235692/wejenikilovilavubuja.pdfIn PDF document text

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