Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dbfa8e1ba92fe5e…

MALICIOUS

PDF

47.6 KB Created: 2021-08-03 11:27:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-18
MD5: 5b7595fab4d5165c1ea10b02286d1983 SHA-1: 9da304db02c80d9d1032476551513434d101a252 SHA-256: 8dbfa8e1ba92fe5e885ed7c767e467c1633fe654fb37bc7351e54c0123e26b2c
154 Risk Score

Malware Insights

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

The PDF file contains a link farm pointing to numerous external URLs, several of which are hosted on compromised WordPress sites. The ML classifier and ClamAV detection indicate a high likelihood of malicious intent, likely related to phishing or malware distribution. The presence of multiple links on disposable hosting and the use of UTM parameters suggest an attempt to obscure the final destination and potentially track user engagement with malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7836

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://autavrabek.cz/obrazky/file/nudofojomegodokeweto.pdf In PDF document text
    • https://jamurgoreng.net/contents//files/xafibabesovelove.pdfIn PDF document text
    • https://thediamangroup.com/_images/files/bevewivipalidin.pdfIn PDF document text
    • http://vietthanhstone.com/images/news/file/jirat.pdfIn PDF document text
    • https://washlounge.in/ckfinder/userfiles/files/talesetawezezob.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/c4e466d028831e9878c078da0b893c4e/laxajuseminogumuwexuw.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/50919aa1a04d150d1a5777b468c91ff4/wewana.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1609833a1b2e6d---woveraga.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/16099337926a5b---55874198588.pdfIn PDF document text
    • https://manualismedicina.hu/fileok/file/56187400296.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/vif87rugdnn960re48jtr5gssi/sudesemim.pdfIn PDF document text
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/7c3h9vt0flhc8l2hf27atjdpq5/48774173349.pdfIn PDF document text
    • http://rotarycochinharbour.org/ci/userfiles/files/36623828112.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=krunker+io+cheatsPDF link annotation