Malicious PDF — malware analysis report

Static analysis result for SHA-256 9302a7dcad2f2d24…

MALICIOUS

PDF

86.9 KB Created: 2021-09-03 21:08:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 21f908d0055160ffac87e2bbe26d27c4 SHA-1: b4e07a39d35b7076e42ab0417be4d3b6098d71e7 SHA-256: 9302a7dcad2f2d249e09dca4b552b122bb68c541c08e40fcd9cdb1eb7ece5c32
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of links, many pointing to compromised WordPress sites, suggesting it's designed to host malicious content or redirect users to phishing sites. The ClamAV detection and ML classifier strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of a phishing or malware distribution lure, likely leveraging embedded JavaScript for malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://cructi.ru/uplcv?utm_term=1980+evinrude+15+hp+manual PDF link annotation
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/4016b8c3a214a809cf9b682cd3e7d993/donemigenawirakik.pdfIn PDF document text
    • http://manuscripthandler.com/userfiles/file/jezavudolabu.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/9d80c53e8487dac6bf268d73252a36d8/2170209657.pdfIn PDF document text
    • https://matrainagycsalados.hu/userfiles/file/pukitukenobotapuko.pdfIn PDF document text
    • http://aprendanow.com/wp-content/plugins/super-forms/uploads/php/files/4d2c3b270a2e01315f3f1d779abf6c84/tifebe.pdfIn PDF document text
    • http://medipharmacompany.com/userfiles/files/rinenetetogavasanama.pdfIn PDF document text
    • http://tikatalog.sk/_files/file/favajura.pdfIn PDF document text
    • http://kenshopvn.com/uploads/files/kurexorexepelamor.pdfIn PDF document text
    • http://arci-mp.fr/admin/File/fapimakovezufenilepaji.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/wonigog.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/9ipul082md1fiebjohtchq5264/judavuj.pdfIn PDF document text
    • http://1night2daytour.com/ckupload/files/19725353876.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/fmkf2a52ujaels43v1spuemora/dokesamo.pdfIn PDF document text
    • https://limmaginebistrot.com/file/51343259991.pdfIn PDF document text
    • http://sreema.org/FCKeditor/file/gixululiluzasovapuk.pdfIn PDF document text
    • https://moveo-sport.pl/userfiles/file/80639365441.pdfIn PDF document text
    • http://tayles.com/uploaded/332308081.pdfIn PDF document text
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/a63bb94bff4de488e4c2a804133bcea5/legajepovukuwimafaned.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/16099be2614c22---38552885016.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/n3b16jv1lnfp0mo0qr52nd8apn/fazodorodapitil.pdfIn PDF document text
    • http://timeyear-v.com/userfiles/file/redomevorogudazagerekames.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/16085db8b2cdda---20112987064.pdfIn PDF document text
    • https://www.assofmt.org/ckfinder/userfiles/files/64981592458.pdfIn PDF document text
    • http://londonjip.com/userData/board/file/zoxazinabosijija.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_off0000edc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC4 17992 bytes
SHA-256: f59a35a4afcb15acbc23dbae7d1f17eaf12ecbed05fa29b398a88b64ff79c44b
font_01_sfnt_off00011c7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C7F 11024 bytes
SHA-256: d8191760568c4cc554d2a348010b68f6cc16073e83dc731e031045c9bf5d2eb4
font_02_sfnt_off000135ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135EF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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