Malicious PDF — malware analysis report

Static analysis result for SHA-256 300d175105bd1b2d…

MALICIOUS

PDF

47.0 KB Created: 2021-09-04 21:15:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: f9a7a749eb190fb552b3688aecd4891e SHA-1: de2f58a7f99040c20c93622cb57492599328c573 SHA-256: 300d175105bd1b2d6dd18840da97f8d4f93f888fcc705d9dc4495d512bcc5d5c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple heuristics as containing a link farm and potentially malicious content, with ClamAV identifying it as 'Pdf.Phishing.Trojan'. The document body is heavily obfuscated, but the presence of numerous embedded URLs pointing to various domains, some of which are associated with compromised CMS uploads, strongly suggests a phishing or malware distribution attempt. The primary attack pattern involves luring users to click on these links, which likely lead to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6912

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://zekejozsef.eu/FCKfeltoltott/file/nimer.pdf In PDF document text
    • http://morecoredesign.com/images/imageUps/files/38158752059.pdfIn PDF document text
    • http://nepalbestcargo.com/userfiles/file/18838255301.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/fm3q5od3el7h8bceobvjqd38d4/simurisojotor.pdfIn PDF document text
    • http://artecgroupservices.com/imagenes/file/guzanexawowijurirag.pdfIn PDF document text
    • http://www.peretprod.ro/content-images/file/mexojamuje.pdfIn PDF document text
    • http://ekopaczka.pl/imgbrama/files/jikofotirabevorumesu.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a5f2bc812cb---62095350872.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079b576d6b15.pdfIn PDF document text
    • https://www.hotelamoha.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a7edb0e81ef---wusogejid.pdfIn PDF document text
    • https://advantagelic.com/singhania/downloads/file/26945199802.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1606f52b547300---nabekepupi.pdfIn PDF document text
    • http://aristosaigonhotel.vn/uploads/files/tiwaru.pdfIn PDF document text
    • http://nifaelectronics.com/userfiles/file/mopejiraxugolisuzulinilud.pdfIn PDF document text
    • http://uk-finansist.ru/userfiles/file/ladupubabufe.pdfIn PDF document text
    • http://linhkienhunganh.vn/luutru/files/20155800260.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/160afb0733c32b---mobivolutev.pdfIn PDF document text
    • http://maytinhtuyenquang.com/home/maytinhtuy/domains/maytinhtuyenquang.com/public_html/images/file/jumofejuxasepela.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/16081cf2c215be---90335724729.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=vade+mecum+em+pdf+2019PDF link annotation

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