Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd6b8dfc1430b616…

MALICIOUS

PDF

51.2 KB Created: 2021-07-18 00:55:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 8a5aaf61d5d491f219fc1dd944849bd2 SHA-1: 4354f465402004dcb1361be26412c48365782eb4 SHA-256: dd6b8dfc1430b61666577b5873d1f2e7e70b2ffcb3f24d35353769d86d33e9ae
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links pointing to compromised websites, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of an attempt to exploit users by directing them to potentially harmful URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7719

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://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160847981303f6---pomipuz.pdf In PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/0v9f52oiui1ptrsk9afebc67c7/58124552627.pdfIn PDF document text
    • http://surmounttravel.com/userfiles/files/nagurukidepi.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/jnc10h0n39u7ikhqef588k4qlr/73114932216.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16080cb34a79b4---79142429481.pdfIn PDF document text
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/sng3obnnvb59d4u8b6nedbnv5o/tukes.pdfIn PDF document text
    • http://sammyuriasproperties.com/userfiles/files/boxijidefisofusogofapabuk.pdfIn PDF document text
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/2874c2b7124018bb18654b372d91d983/tekuxuberoxejafenar.pdfIn PDF document text
    • http://cpspcb.com/uploads/files/xiwonu.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/c96e9a857c306edf5ab6b3cf15c7dfe4/kivegalifobox.pdfIn PDF document text
    • http://www.moyekolodin.com/files/47247711124.pdfIn PDF document text
    • http://easytravel63.ru/ckfinder/userfiles/files/desufukilokoxi.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1608167cc9ea40---9695474751.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/i4roknadsggprivqbma5pdh9gs/96123366490.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089c4eb59152---75034801012.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/2980532839a47b8f49ae27cd5b4647f4/25992451558.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/86a4a7bfc50028a76df38e47bf5b2f98/5520353368.pdfIn PDF document text
    • http://krakow4you.pl/krakow/files/wopawata.pdfIn PDF document text
    • http://deurenhanger.nl/userfiles/file/rabuka.pdfIn PDF document text
    • http://robalton.es/Albums/images/file///jusaberamedot.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606c92318e49a---risurutazojo.pdfIn PDF document text
    • http://go-pxl.com/uploads/files/63861265142.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=fundamentals+of+corporate+finance+7th+edition+brealey+pdfPDF link annotation
    • https://mediaget.com/userfiles/files/95421123754.pdfIn PDF document text

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