Malicious PDF — malware analysis report

Static analysis result for SHA-256 94417168bc6b52a9…

MALICIOUS

PDF

79.3 KB Created: 2021-09-01 14:27:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 07527102cc33c966623d76735e66e387 SHA-1: 9c6deb2308147ea546321988ea01b15a6f118608 SHA-256: 94417168bc6b52a99aa6ec5261dc3064a59484d9d7fc6099cdad3cd0a2bc6836
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and multiple external URIs, many of which point to compromised WordPress upload directories or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a link farm designed to manipulate search engine results, often used for phishing or distributing malware. The embedded JavaScript, while not directly analyzed for specific actions, is a common vector for exploiting PDF vulnerabilities or initiating malicious downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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
  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://udruga-invalida.hr/files/20331232533.pdf In PDF document text
    • https://caraudioshop.ro/mm/file/58832342881.pdfIn PDF document text
    • http://kasargod.net/uploads/file/tubola.pdfIn PDF document text
    • http://barksdalereunions.com/clients/869108/File/bivenilegos.pdfIn PDF document text
    • http://josepholszowka.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/80553696166.pdfIn PDF document text
    • https://yptea.com/data/fckeditor/files/dimiseronuzojulidudod.pdfIn PDF document text
    • https://worldcastlive.com/userfiles/file/wafisitis.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160903855893ee---janagur.pdfIn PDF document text
    • http://sotel-perm.ru/site/file/97831324371.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/160983e89a0e12---wadojazaxuj.pdfIn PDF document text
    • http://geredekombiservisi.com/userfiles/file/rifasuroratifiluvipina.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/d2d50da264fc092c39862e1fe91905c0/dofokatobulenar.pdfIn PDF document text
    • http://herbwaterthailand.com/userfiles/files/63036316074.pdfIn PDF document text
    • http://ash-graphy.com/userfiles/file/lasijovovesixoxuposegefit.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/f9097560aacbba3d204068508612f112/11327747992.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a976f169021---jolugerozizabumesifop.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606e9572d8fe7---gijugubavusud.pdfIn PDF document text
    • http://paintmaster.hu/js/ckfinder/userfiles/files/54015362556.pdfIn PDF document text
    • https://gancza-yacht.pl/userfiles/file/95845752463.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ade0293b0d6---boramowuvujeruziw.pdfIn PDF document text
    • http://beamstraffic.ae/amb/userfiles/file/mawemina.pdfIn PDF document text
    • https://tedvandergulik.nl/userimages/file/42554536660.pdfIn PDF document text
    • http://mkpstroitel.ru/upload/files/boneromidi.pdfIn PDF document text
    • http://shiinamotors.com/js/upload/files/9569945519.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608efb0b5de60---40507738917.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=what+is+mrs+nergPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d2ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2CA 17596 bytes
SHA-256: de6eefe3ee3d64c937e2db10267de343f3c608edd8f18025af3ddf7a25504e81
font_01_sfnt_off00010028.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10028 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001183f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1183F 10380 bytes
SHA-256: a1444f491ff44ad3f13894f6360c64b479d5230d60789718b3973ae6df6e4fe1

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