Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd7589e8e8512d06…

MALICIOUS

PDF

58.4 KB Created: 2021-09-19 00:28:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: c6aeaa2a234164f7c4c5b47e09dfea96 SHA-1: 4d727af97ecba85ac1a09bf098bc863a96656af3 SHA-256: cd7589e8e8512d06437017c2c6b96827c0a927f5d64631bed799c9c2d460408e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised CMS upload directories, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5046

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://huntic.ru/uplcv?utm_term=play+game+free+download PDF link annotation
    • https://orsam.org.tr/paketler/ckfinder/dosyalar/files/kolusabuzefowizov.pdfIn PDF document text
    • https://mysilo.com/upload/ckfinder/files/guwojaxiz.pdfIn PDF document text
    • https://eastmangroup.org/ckfinder/userfiles/files/debunelaxug.pdfIn PDF document text
    • http://nawooelcs.com/upload/userfiles/2021/09/files/210918104354.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/50458ed81ec1f31572c854b094797e66/gajefibudit.pdfIn PDF document text
    • http://www.introspekta.si/ckfinder/ckeditor_uploaded_files/files/88684647255.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/r3v4lnd0ipbeipikmfsmpofumd/98469214709.pdfIn PDF document text
    • http://sonnenheizung.ch/fckeditor/editor/images/file/kebomizulelarofejop.pdfIn PDF document text
    • https://sahyadrisevasanstha.in/userfiles/file/digupidewetiwifib.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161430d635447c---28005432326.pdfIn PDF document text
    • https://wic-net.com/userfiles/file/75401798523.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/3fa7b4d8e5da3ee45df0e247a6b96603/16941614838.pdfIn PDF document text
    • http://ambulatorioveterinarioilprato.eu/userfiles/files/jugisasivofadajadote.pdfIn PDF document text
    • http://www.rify.us/cms-uploads/files/60254698863.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files/menerumewepizezukiza.pdfIn PDF document text
    • https://congnghieptauthuyvietnam.vn/upload/files/seribudolosatawa.pdfIn PDF document text
    • http://cistenivytahu.cz/upload/file/80564342870.pdfIn PDF document text
    • http://design-klasse.de/ckfinder/userfiles/files/29439057861.pdfIn PDF document text
    • http://potlista.com/file/files/kagesowofip.pdfIn PDF document text
    • http://www.beverburcht.nl/upload/files/mogewodedaxebatadiwebaba.pdfIn PDF document text
    • https://mar3ol.com/Files/files/sulapopivedelitezu.pdfIn PDF document text
    • http://canadianrockies.ca/files/file/tijaseja.pdfIn PDF document text
    • http://gamecoast.by/uploads/files/zimukituvanovewa.pdfIn PDF document text
    • https://ctcitsupport.com/media/files/lutuvupevudujogojaka.pdfIn PDF document text

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