Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a42bc6a210a759a…

MALICIOUS

PDF

54.6 KB Created: 2021-06-27 23:14:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 73a0b41e41b9b6f45cd0e2fee06e1455 SHA-1: 169d50b290d35aa78c0e01f2fb47d9830eabcfe3 SHA-256: 8a42bc6a210a759ae4104ec188dbb9fbd91b9f9867668abbd2e0ee0fcabbfa24
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous embedded URLs, many of which point to compromised CMS upload directories and disposable hosting. Heuristics indicate this is a link farm, likely intended to lure users to malicious sites. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious classification. No scripts were extracted, and the document body was unreadable, limiting further analysis of specific user lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6714

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 https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/3of1ocq2a6gh3g092hkgru9fra/5611362650.pdf In PDF document text
    • https://www.mii.net/wp-content/plugins/super-forms/uploads/php/files/5a7cdf17f9f40433f9e5e8c7be0ec906/xerowut.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4e9622a22a---39582592210.pdfIn PDF document text
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/776d52068f55ddb49d0b8cb2a2b971d7/mefulora.pdfIn PDF document text
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/9cdb53611c4090fb972d8a85a27b6c20/delup.pdfIn PDF document text
    • https://paymentor.nl/uploads//file/96779342681.pdfIn PDF document text
    • http://zae.me/datafiles/file/58997988279.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160965e8a29e8a---65181144849.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/3c7f3cd331698420eb33d720beaa3914/topavo.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b17603fe1d---10324365866.pdfIn PDF document text
    • https://www.cpro.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa7996a08d---54042009139.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cbff31c7e4---47130927666.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/9rui1mmsj4mf679nbak7olqrj7/14184208469.pdfIn PDF document text
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2175e6406---xawigajanolufimerubi.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1d01692ccc---90885294735.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a84ab7d61cf---25832739067.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608c904e740e6---suremit.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160999915957fe---zozafutememogotebafawapa.pdfIn PDF document text
    • https://dbmotorbrokers.com/userfiles/file/jozinomuz.pdfIn PDF document text
    • http://internationalnetworksolutions.net/files/In PDF document text
    • https://kar360.com/resimler/files/nefumovivokuwaxafatabifis.pdfIn PDF document text
    • http://ed-web.cz/userfilesfile/67339080353.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160922291cce85---3186642582.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b18af87583c---vujomexufi.pdfIn PDF document text
    • http://gymostrov.org/gymostrov/userfiles/file/wolol.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=words+to+describe+someone+starting+with+vPDF link annotation

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