Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbe20b229481cbf6…

MALICIOUS

PDF

83.7 KB Created: 2021-09-17 14:49:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 238d572d6dfad2419fd88a27d44fa5b4 SHA-1: 9f31d206dd60f54e3a94c9ddb0cda44c25db3ef5 SHA-256: bbe20b229481cbf66302901bdbafb42ba89ce71c18d28f12204b8d43619c6030
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV. It functions as a link farm, containing numerous URLs pointing to various websites, some of which are hosted on compromised CMS uploads. The presence of multiple links and the 'utm_term_redirector' flag suggest an attempt to lure users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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://www.valathors.com/ckfinder/userfiles/files/36056797225.pdf In PDF document text
    • http://crmrealty360degree.in/userfiles/file/galuju.pdfIn PDF document text
    • https://isosklo.cz/uploads/pewubumilavikasufuz.pdfIn PDF document text
    • http://ville-dammarie.com/ckfinder/userfiles/files/jaguxafad.pdfIn PDF document text
    • http://allgeology.ru/ckfinder/userfiles/files/1669478314.pdfIn PDF document text
    • http://motivationandmomentum.net/ci/userfiles/files/44485143223.pdfIn PDF document text
    • http://learnazia.com/fck/imagesfile/8321389237.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/5vlfmqrv00h28oco9484glr4ef/54887500176.pdfIn PDF document text
    • http://amsaneeraus.fi/userfiles/files/50425077459.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613880c23aff6---7861413887.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/b515380529878fca4a48891930a58bfa/zegiwevaxe.pdfIn PDF document text
    • http://live-lessons.net/lcj/web/uploads/assets/file/51347875079.pdfIn PDF document text
    • https://wroclawmodelshow.pl/ckfinder/userfiles/files/wofutipibizit.pdfIn PDF document text
    • https://honghow.com/ckfinder/userfiles/files/rovufavaxutatobalurax.pdfIn PDF document text
    • http://copy2d.com/ftp/image/file/xupag.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c0ce27ba04---12873237895.pdfIn PDF document text
    • http://dailygameresult.com/editor/UserFiles2/files/26652201651.pdfIn PDF document text
    • http://ciskmv.com/css/file/78484544160.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/kuxuviwibaduvep.pdfIn PDF document text
    • http://hemeringen.de/ckeditor_ablage/userfiles/files/xezubezulova.pdfIn PDF document text
    • http://sugarfree-gelato.com/upload/file/81706254421.pdfIn PDF document text
    • https://lyna-garage.com/htdocs/cljr/data/files/xotawupusifokowepaja.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/4718849210.pdfIn PDF document text
    • http://sipzip.com/userfiles/file/59843462133.pdfIn PDF document text
    • https://karatenarrewarren.com.au/ckfinder/userfiles/files/lozesuwekokojejag.pdfIn PDF document text
    • http://hertzlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/86414086293.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=shadow+fight+2+hack+unlimited+money+and+gemsPDF 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_off0000df13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF13 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f725.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF725 17932 bytes
SHA-256: 60d8ca16167d85419a75b8f0a59c69d78f034a3836cf657cb13d59fc39875458
font_02_sfnt_off00012628.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12628 11412 bytes
SHA-256: 8a1d9643f042900329dbd7d0217dcd58c1da97152fd9cefd38aba8710da50663