Malicious PDF — malware analysis report

Static analysis result for SHA-256 af28f035c4f119ef…

MALICIOUS

PDF

71.7 KB Created: 2021-07-07 07:08:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 47e7770212b208f1c1c596ff806843a1 SHA-1: f435bb1455ae7d8f4a3588023d5795e1a5f5db79 SHA-256: af28f035c4f119ef64f7e00b203bbf3e35e6545e0222e0e0e38276d15d43ac21
152 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV with a 'Pdf.Phishing.Trojan' signature. It contains embedded JavaScript, which is often used to execute malicious code or redirect users. The PDF also features a large number of external URIs, many pointing to compromised CMS upload directories, suggesting a link farm designed to distribute malware or facilitate phishing attacks.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4718

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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 https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608162ff5f521---wilimunoza.pdf In PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/efe80591c9f8bdbc82dd51859b858e0f/dosepokipuweradevorovevav.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b273360811c---xijesubidepadaginij.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608677ab46ffd---1594827596.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/1dc28ef9bcdee77d26ff8184cae84ab4/90673433531.pdfIn PDF document text
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/dc8e249e23b936291fedc5481dc7a1fc/joviwevagoxivul.pdfIn PDF document text
    • http://mayfamilycircle.com/clients/5/53/53cd9f4101e72b768929e5daf979c2da/File/53473855966.pdfIn PDF document text
    • https://ktmcollege.org/public_html/userfiles/file/49993158561.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160e2df4d499d7---xofotezu.pdfIn PDF document text
    • http://xn--80aaeiengkwpz6p.xn--p1ai/pub/file/25485434699.pdfIn PDF document text
    • http://vinabomi.com/uploads/userfiles/file/jijalebidunok.pdfIn PDF document text
    • http://colorfulmedia.de/fotki/fotki/file/pekuzide.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/97114142d6f28e1064ea47b478a8a5d9/pigakor.pdfIn PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/617c51f2e21a8c4fe7eb899208892efa/dagefagorabizabibe.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160935b3ccb8f3---mikire.pdfPDF link annotation
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/16099e3f9af8e9---94077617377.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/acb0e4f268116211f91bb0ba503ae8d3/71023394067.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075ba1c3627b---11738109819.pdfIn PDF document text
    • http://xn--h49avwqct32ewe967crscpsaz7d.com/ckupload/files/50853875942.pdfIn PDF document text
    • http://vdtonline.vn/static/uploads/editor/files/35111818080.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c8f86f1fd23---numaroganu.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/27061a0d2c8c600d760242e819a62fb4/tigefuvofubewada.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098773247ab8---jiwoxaxipefitafobabogon.pdfIn PDF document text
    • http://motoren-adachi.com/js/upload/files/vupogowef.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/160886d9cdb844---27717469255.pdfIn PDF document text
    • http://inimtrento.it/userfiles/files/mefudata.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/epjkmgudv4l0khpbd24rtgpvpc/73853677663.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=james+fox+thoroughly+modern+milliePDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A5 17248 bytes
SHA-256: 6ea56817bfc6a60e2ae1acee9516a912fcd34c26e51dc5ef0b4760281e2278f6

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