Malicious PDF — malware analysis report

Static analysis result for SHA-256 993ebc2cbc12587d…

MALICIOUS

PDF

79.0 KB Created: 2021-07-15 12:45:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 10cc39161c45e8b7805d5afa69f17b02 SHA-1: 32aa63fb898b50a999263d32a20ffdfeac25e8f8 SHA-256: 993ebc2cbc12587d9d3d16bb787a513323eba8cfb10ab4f20ab94f51f53d3041
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment. The ML classifier also flagged the PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6993

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
  • 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 http://solee.cn/ckfinder/userfiles/files/mawuzisubuvuxesarusipup.pdf In PDF document text
    • http://nhuaduongnhapkhauaz.info/upload/files/tatuzokarozod.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a9bc7d68574---libidaxewejudon.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16075bebf07e39---63782942045.pdfIn PDF document text
    • https://goldenapp.net/file/89359583344.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7b5bd313ce---97107563022.pdfIn PDF document text
    • http://peneleos.pl/userfiles/file/nurejuvegedimipoled.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/ca1e331cc966919c6a6284376ccaaf48/22701377021.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/25f7d903a6d2352b9363f3dbe37d4a7e/sizideluvuwadamiwexos.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160777ec88f551---49252225833.pdfIn PDF document text
    • https://agentcctv.com/userfiles/file/38405400978.pdfIn PDF document text
    • https://biogenetixpharma.com/ci/userfiles/files/24335875598.pdfIn PDF document text
    • http://staractivecollection.com/resimler/site/files/13981007260.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab88f024bf1---6410555803.pdfIn PDF document text
    • http://daeryuhealthcare.com/ckupload/files/593913042.pdfIn PDF document text
    • http://alphabodysupplements.com/newerac2c/userfiles/file/rodifufonifobaweb.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=gta+vice+city+sir+yes+sir+missionPDF link annotation

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