Malicious PDF — malware analysis report

Static analysis result for SHA-256 48c037404fae23eb…

MALICIOUS

PDF

47.8 KB Created: 2021-09-03 21:14:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: a6a5a26bcb17fd9d71eac49ae1e641dc SHA-1: afb57443ae2e6edea00c77bd8ddffc72b49cb5e1 SHA-256: 48c037404fae23ebc6e7f4d9e8c4727ac8796ef591b7cd8f2b8d82a5a0395914
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to other PDF files hosted on compromised websites, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8101

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://motoquadro.de/userfiles/file/99171976564.pdf In PDF document text
    • http://abimobiliare.pl/pliki/File/vewadapapoguzadap.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/ogakukudobinema.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/u034984sr091ol81c4fdkllpb6/kokid.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/prgjcop33rk0ssk6n9qoofse01/rokenujinon.pdfIn PDF document text
    • http://steakpluspizza.us/userfiles/file/degotowubomikavipu.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160be011ed3f6d---11517268150.pdfIn PDF document text
    • https://yuktogel.com/contents//files/rixisesuvuwugi.pdfIn PDF document text
    • http://duythuc-bearing.vn/uploads/userfiles/file/zomoxonizagoxijidele.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610a0e2a1708e---95827522888.pdfIn PDF document text
    • https://tradingphrases.net/userfiles/files/rarumafogepulelinudazoda.pdfIn PDF document text
    • https://dakotaterritorydevelopment.com/ckfinder/userfiles/files/8419107157.pdfIn PDF document text
    • https://www.fangjin.org/ckfinder/userfiles/files/gikotu.pdfIn PDF document text
    • http://toroisg.com/public/images/files/zetofifabu.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/16087e9a45c75b---xujosu.pdfIn PDF document text
    • http://superlitefan.com/uploads/files/65541285479.pdfIn PDF document text
    • https://polymadeniyaglar.com/fckeditor/userfilIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=wuthering+heights+pdf+drivePDF link annotation

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