Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ad788327192bcd4…

MALICIOUS

PDF

53.9 KB Created: 2021-09-07 20:52:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: f7f057387dd849bb4282892bc0f6f01d SHA-1: 2a2a61a5a4326af0feb0f6d69995ab4aa0554e72 SHA-256: 1ad788327192bcd4950cc4dd362e0d277175eb592efc7ba7622aa034f74f43d1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple external websites, some of which are hosted on compromised CMS uploads. The presence of numerous links and the use of disposable hosting suggest an attempt to obscure the ultimate destination or distribute malicious content. No scripts were extracted, but the PDF structure and URL patterns are indicative of phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7097

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 http://obraz-tlt.ru/userfiles/file/dozajisejisit.pdf In PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160764a0f4882c---javasorijarumasaxefixejow.pdfIn PDF document text
    • https://petandpuppies.com/userfiles/file/vodufezevuvasijebabezi.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a17ec9cbb4e---zilidubukasozixolade.pdfIn PDF document text
    • https://datatech-int.com/userfiles/file/13224752390.pdfIn PDF document text
    • http://centralwestwoodclassof1983.com/clients/c/cd/cd4b3c89dd1500142a52f05b9125c350/File/10078865265.pdfIn PDF document text
    • https://agencement-menuiserie-var.fr/stockages/files/fuzobu.pdfIn PDF document text
    • https://pensiuneavlasin.ro/wp-content/plugins/super-forms/uploads/php/files/rk3t303md170gtvnallp1msl0k/nojojupijakobiwuj.pdfIn PDF document text
    • http://griswoldremgmt.com/uploads/files/xuzuziruzi.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/a60682ccfb3df911e40530fd8414a4cb/59473792164.pdfIn PDF document text
    • http://zartmobilia.com/userfiles/file/20210625055218.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160952bef8b057---jagawevu.pdfIn PDF document text
    • https://bruceautoservice.com/files/file/gokitixasawojumo.pdfIn PDF document text
    • http://eko-uklid.com/files/file/kakabubenotefukude.pdfIn PDF document text
    • http://majorpropertygroup.com/userfiles/files/72778912587.pdfIn PDF document text
    • https://reflexlighting.com/wp-content/plugins/super-forms/uploads/php/files/2301f01b1d1410b84346ed84bc2ecae6/42142104588.pdfIn PDF document text
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160857b370b7dc---watedoxewubow.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/ltc7iqrp73gs457e7je1vmi6gb/21437665747.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=mapa+de+quintana+roo+con+nombres+pdfPDF link annotation

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