Malicious PDF — malware analysis report

Static analysis result for SHA-256 294c35986911698c…

MALICIOUS

PDF

77.7 KB Created: 2021-09-04 08:30:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: b378ebabdd01c5cae20d896309052076 SHA-1: bf33382737d78b41dd5b1ac264b6181f8268f867 SHA-256: 294c35986911698cd595a0b1b5e3bf2d23f74b2a6c1364e0f1fe94488a07823f
156 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous URLs pointing to various domains, many of which are hosted on compromised WordPress sites or disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of multiple external URIs and link farms suggests an attempt to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be86c418b70---51494898279.pdf In PDF document text
    • http://thankschicken.com/uploads/files/25696528642.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae41403d2d2---xudojofenesebabuxutuxi.pdfIn PDF document text
    • http://rhondadejean.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jokugesawur.pdfIn PDF document text
    • http://asckhn.com/acskhn/userfiles/file/wajikerawe.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/16108d79199349---92564937925.pdfIn PDF document text
    • http://como.gattinonimondodivacanze.it/themes/userfiles/files/nigorireluxatelolav.pdfIn PDF document text
    • https://alquimia.in/admin/fckeditor/editorfile/jozujevog.pdfIn PDF document text
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/gsm25vf4h140pdfjl36j8ineq5/87003059197.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/adad0f87e07b705fba0f5b3ed0d4f35e/mufemenuxovumofaf.pdfIn PDF document text
    • http://xn--80affcyoc0ac1f6a.xn--p1ai/admin/modules/ckeditor/ckfinder/userfiles/files/dilizuz.pdfIn PDF document text
    • http://artecgroupservices.com/imagenes/file/63140872161.pdfIn PDF document text
    • http://pwmtqatar.net/userfiles/file/31910564785.pdfIn PDF document text
    • https://papersacksfactory.ae/images/bulk_images/files/larefevuriniveve.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/5f23b7128c984851eaffe9b8809628af/fuxuxagolugorej.pdfIn PDF document text
    • http://leprofit.ee/cmsfile/contentfiles/topilofiposibijiwejob.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/c14d716ea7c9b1143d73e10f98a97f78/zanibakijidekok.pdfIn PDF document text
    • https://maconlux.ovh/userfiles/files/fapakafonasigebara.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/5e43148ec611155d7133e05bd526b27a/42209045153.pdfIn PDF document text
    • https://nanyangtextile.com/userfiles/file/jageromumezitenoduwu.pdfIn PDF document text
    • https://securitydm.com/slicice/file/fokonelikosuk.pdfIn PDF document text
    • http://mijinmotor.com/fckeditor/userfiles/file/4370250508.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=acg+clinical+guideline+management+of+benign+anorectal+disorders+pdfPDF 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_off0000c884.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC884 17948 bytes
SHA-256: 0123ad85423c26961f11eb857eb20bf3135ddc32c9715c9e9ce08b2dd39bef65
font_01_sfnt_off0000f6bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6BB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010ed2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ED2 11184 bytes
SHA-256: 0af721ed067ff6ae229f032cc59b850ceedcbe5d07747d1ba6e4463fc2873f9d

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