Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ca17da9199b4a88…

MALICIOUS

PDF

86.4 KB Created: 2021-09-01 16:04:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: eddb0c36b842130c6e53243ac5361905 SHA-1: cdb3d3088e178dee6d2473f9defa166f44939912 SHA-256: 3ca17da9199b4a8885d93a113711af756daee7e05f5e79260864df17f43ed7ee
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users. The primary purpose appears to be directing users to malicious external sites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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.
  • 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://drafthe.ru/uplcv?utm_term=shepherds+after+my+own+heart+meaning PDF link annotation
    • https://mariellatriolo.it/public/file/ripisobazaloze.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612d822dc0ad9---wiretavipiloja.pdfIn PDF document text
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/at816lokq4e0cfiv9piiqs6ik4/25085032226.pdfIn PDF document text
    • http://www.firengo.com/userfiles/files/93578435696.pdfIn PDF document text
    • https://tecnibat.net/uploads/archivos/lipolipeza.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/b15734693c9d9781e96f9231d1389da2/tagimanulitovexakiwexo.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/1606e9eaa06a94---40116484457.pdfIn PDF document text
    • https://benqmusicworkshop.com/fupload/file/83569188203.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/160c0690cd8b18---45358039756.pdfIn PDF document text
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c83943b6d5---setibuwiluvelefo.pdfIn PDF document text
    • http://archgeo-leszno.pl/uploads/userfiles/files/zenekugawibexizasixone.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/emug9ob1viaj1q7dlabktoak94/77158779624.pdfIn PDF document text
    • http://poorclarescork.ie/images/68813905607.pdfIn PDF document text
    • https://stcc-sa.com/motakamel/Ups/files/gezufelabamenadik.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16096bc93c74f8---19992949693.pdfIn PDF document text
    • http://sahamit.net/userfiles/file/89250059498.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1607d68bfafcec---51551308703.pdfIn PDF document text
    • http://progfin.pl/userfiles/file/nebatetupefetetimad.pdfIn PDF document text
    • http://hondatayho.top/img-ngocbao/files/joniwaguzux.pdfIn PDF document text
    • https://www.supremecaravans.com.au/application/third_party/ckfinder/userfiles/files/golelegis.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd39a3d563---92464116440.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/ieks6k648t71b3bp8lgpuk7qrj/94930435233.pdfIn PDF document text
    • http://mutitar.com/user_img/files/jaxemasaxowigedanogojeke.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4bf29c0b75---pabakesarebukinazerav.pdfIn PDF document text
    • http://nail-free.com/ckfinder/userfiles/files/19268509185.pdfIn PDF document text
    • 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_off0000e691.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE691 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fea8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEA8 11172 bytes
SHA-256: 167a3dcfd40fbb62eaa645166d63c521034924e3a75d412a51ce6ab39f529875
font_02_sfnt_off00011883.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11883 18956 bytes
SHA-256: 9e62fa5bd3be43661ef18aaf11479d3d45f2d742af7693fa5a1a22e6bdc5f043

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