Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b7b9b6e46a18c2b…

MALICIOUS

PDF

54.6 KB Created: 2021-09-04 22:28:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: eed997b2c28df51ef459dd45b6c822c9 SHA-1: ae1f26a69878e410060f234798021bd3678788a4 SHA-256: 1b7b9b6e46a18c2ba0b0bc07cc299aa51c90ae6c2de70f4b07d36565fc02c35d
162 Risk Score

Malware Insights

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

This PDF sample was flagged by multiple heuristics, including ML classification and ClamAV, indicating malicious intent. It contains embedded JavaScript and a significant number of external URIs, many hosted on disposable domains or compromised CMS uploads, suggesting a link farm designed to redirect users. The presence of embedded JavaScript points to potential exploitation or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6382

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://xn--oy2b19v1mb1yi.com/userfiles/file/25389542845.pdf In PDF document text
    • http://solee56.com/ckfinder/userfiles/files/21826497186.pdfIn PDF document text
    • https://dietacud.eu/upload/file/6533975947.pdfIn PDF document text
    • http://narnivet.com/userfiles/files/guralevix.pdfIn PDF document text
    • https://canionglobal.com/FCKeditor/file/pizovusemalalopapoxa.pdfIn PDF document text
    • http://www.phsdcenter.com/temp/js/ckfinder/userfiles/files/xonij.pdfIn PDF document text
    • http://www.zolmedis.lt/ckfinder/userfiles/files/nojefig.pdfIn PDF document text
    • http://goodslib.com/userfiles/files/52060770906.pdfIn PDF document text
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a7d8a18a34d---sufuxem.pdfIn PDF document text
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/0ab9be480e70b1362e026271b8240267/33641254310.pdfIn PDF document text
    • http://gyobel.itpublic/file/rulosoro.pdfIn PDF document text
    • https://htchninc.com/d/files/vakusujajodipadi.pdfIn PDF document text
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/28cbe1c0dd5c80026ea94e7a6bc2d4dd/3498737599.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/53772327993.pdfIn PDF document text
    • http://spoanalyze.com/wp-content/plugins/super-forms/uploads/php/files/9f85428e4ee339ec56107a5ec07c6105/10130934910.pdfIn PDF document text
    • https://asi-filter.pl/files/file/sorafedozapusefaderuk.pdfIn PDF document text
    • http://micruts.org/userfiles/file/vevaliwizi.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1610358cad4054---lolimu.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160947c9c17e0b---xalogokuwesitubuvude.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/8b5fd68cc72281e1fc03f374f91589d3/525370601.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=accounting+concepts+in+telugu+pdfPDF link annotation

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