Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b7538da37aed7f0…

MALICIOUS

PDF

63.5 KB Created: 2021-05-17 23:07:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 581c9bbdd5f22c67bb29ec1c0b1930f1 SHA-1: c5fed01ef97f96b6d2d0c2ba4eb86b93f95c225b SHA-256: 5b7538da37aed7f0d340f1b4b91687db2d308de33add91904f6f229f99779a85
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which point to Weebly-hosted PDFs with numeric slugs, suggesting a link farm or SEO manipulation tactic. One of the primary URLs extracted is a suspicious domain ('midufefew.ru') with a query parameter that appears to be a search term, likely intended to redirect the user to a malicious site. ClamAV and ML classifiers also flagged this PDF as malicious, indicating a phishing or trojan distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5348

Heuristics 4

  • 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.
  • 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://midufefew.ru/strik?utm_term=how+long+to+cook+woolworths+chicken+kiev+in+air+fryer PDF link annotation
    • https://fetubuka.weebly.com/uploads/1/3/1/3/131379928/kidubexukilono_duwuxovor_nizazizizaroja_sovosagegumova.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426270/normal_5fdf717e7bfe9.pdfIn PDF document text
    • https://zadevadetolilug.weebly.com/uploads/1/3/5/3/135321342/gezekibutekasogifu.pdfIn PDF document text
    • https://mitesevutij.weebly.com/uploads/1/3/4/7/134717039/4793715.pdfIn PDF document text
    • https://fenutirixe.weebly.com/uploads/1/3/4/6/134640366/8903046.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379237/normal_5fec9bbebcc8b.pdfIn PDF document text
    • https://pixirexujana.weebly.com/uploads/1/3/4/5/134527097/gakuduguwuleru_logafezine_minepivitidi.pdfIn PDF document text
    • https://ronojunigamedez.weebly.com/uploads/1/3/5/2/135297775/jodefuwiba_tepevileluruxi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420939/normal_5ff8d349d6a8e.pdfIn PDF document text
    • https://bovuzujavus.weebly.com/uploads/1/3/5/3/135326818/pokojajeke_zedes_sizuluv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454300/normal_600aeffda8b6c.pdfIn PDF document text
    • https://boxorefo.weebly.com/uploads/1/3/0/9/130969922/wokupezix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375344/normal_6020556e369c4.pdfIn PDF document text
    • https://biravozoso.weebly.com/uploads/1/3/4/4/134400929/milewemesana.pdfIn PDF document text
    • https://bosamekuxukis.weebly.com/uploads/1/3/4/6/134672370/rigegozutezi.pdfIn PDF document text
    • https://lerizizevu.weebly.com/uploads/1/3/4/3/134314130/00357857.pdfIn PDF document text
    • https://s3.amazonaws.com/defujo/agatha_christie_books_for_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/pujirageg/ziratomikimogifuzodu.pdfIn PDF document text
    • https://s3.amazonaws.com/gonafoziguwewe/application_form_format_in_ms_word.pdfIn PDF document text
    • https://s3.amazonaws.com/budovewesekaz/vofonebaxejobajebiridudu.pdfIn PDF document text
    • https://s3.amazonaws.com/dudujopixejikug/evenflo_chase_lx_harnessed_booster_car_seat_jubilee.pdfIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/hunter_gsp9700_road_force_balancer_price.pdfIn PDF document text
    • https://s3.amazonaws.com/gadumagabusodel/56514309524.pdfIn PDF document text
    • https://s3.amazonaws.com/nuselufuzo/tolatiso.pdfIn PDF document text

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