Malicious PDF — malware analysis report

Static analysis result for SHA-256 82fb1a329c342779…

MALICIOUS

PDF

59.7 KB Created: 2021-06-10 05:28:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: e1df8e10e061c12004c26ca7b2ff890f SHA-1: fceba39c00ea8e87092e34e7acab7bb760a6d455 SHA-256: 82fb1a329c34277947c4860e213cbcc642c976020cf2485540f718b8eb9c6eda
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains numerous links to external websites, many of which are hosted on compromised WordPress installations, suggesting it functions as a link farm to distribute malicious content. The presence of embedded URLs and the nature of the heuristics strongly suggest an attempt to redirect users to malicious sites, likely for phishing or malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6847

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://laborke.ru/uplcv?utm_term=shadow+fight+2+99+max+level+mod+apk PDF link annotation
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/3661a58746d3bc1901502f7e714938ff/zusisawudenakijeraruviven.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a132f4d79eb---popepo.pdfIn PDF document text
    • http://prttour.ca/FileData/ckfinder/files/20210603_406EAAF16DB48EF7.pdfIn PDF document text
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/1sik7gvbououv1eh7vvbmcepkl/39133200440.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160861d3775e1f---97952535586.pdfIn PDF document text
    • https://amitadevnani.com/userfiles/file/90592947160.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/6fnmun7ksdqkiq19dmhqvp2p5u/mopixotazesokoxitazefoja.pdfIn PDF document text
    • http://saokienviet.com/uploads/image/files/verilapexodumetudonasoj.pdfIn PDF document text
    • http://rollfactorytogo.com/uploads/files/mexifatitediz.pdfIn PDF document text
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae8b99a10df---zogupewojabudizoteju.pdfIn PDF document text
    • https://eyetracking.pl/userfiles/file/ranejefawagidogefazoj.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a25f9e1cac7---nubezoxedidi.pdfIn PDF document text
    • http://hoondb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608559f83cd65---57301986942.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/osomphmd2ev7ftjp56ll2v6j7i/wusanon.pdfIn PDF document text
    • http://retroldn.com/userfiles/file/lopakekenoge.pdfIn PDF document text

Related samples 8

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