Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ac979a7b84d5d96…

MALICIOUS

PDF

96.0 KB Created: 2021-07-24 08:36:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: f4b60b140ccbcd99f2229906e70d8f9a SHA-1: 460c767c48976e06f805b9072fad015dd5430285 SHA-256: 2ac979a7b84d5d968f13d2746d868bffb27eea0c376dadaf474324efc77eb878
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of links, many pointing to domains associated with compromised content management systems or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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://stellamaris.cz/userfiles/74870746265.pdf In PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071508429052---50378423989.pdfIn PDF document text
    • http://www.accl-calibration.com/login/ckfinder/userfiles/files/53306179539.pdfIn PDF document text
    • https://unosms.us/userfiles/file/paxosivolufiro.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/bqgopmevag961e4m1qt38lo5i4/37104163400.pdfIn PDF document text
    • http://wagnerfamilyreunion.com/clients/866685/File/64164717983.pdfIn PDF document text
    • https://francoisdaulte.com/ckfinder/userfiles/files/fukaj.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9f990365ca---boxesopa.pdfIn PDF document text
    • http://koryosushi.com/uploads/files/88566634091.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/1le1ticaetfrkebilni1lf7da5/51394935616.pdfIn PDF document text
    • https://www.pharmawell.eu/ckfinder/userfiles/files/puninizetelav.pdfIn PDF document text
    • http://tsradviseurs.nl/mailing/images/photo/file/notoxemenebogizofe.pdfIn PDF document text
    • https://medicentrumnz.eu/medicentrum/files/file/duzuvubewojugedanuba.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160afec3468eea---25313557869.pdfIn PDF document text
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/t4up2oja3fmmod7aon8i5u92kr/25930566212.pdfIn PDF document text
    • http://barksdalereunions.com/clients/869108/File/65868327649.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/89f055b5a70e4526a092095e5e6a8191/zujuwedanipavu.pdfIn PDF document text
    • https://irantruck.ir/data/file/ronageriraboleno.pdfIn PDF document text
    • https://rmp-traueranzeigen.de/cms/files/39410648093.pdfIn PDF document text
    • https://poolpoint.be/uploads/file/paxop.pdfIn PDF document text
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e55f8faac2f---bumasizuzowexina.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16071c7ba379ce---5864847555.pdfIn PDF document text
    • http://richmediahouse.com/admin/uploads/file/39555631081.pdfIn PDF document text
    • http://lorofilmes.com/Uploads/ckfinder/userfiles/files/sisuvux.pdfIn PDF document text
    • http://forglass.sk/userfiles/file/93255732991.pdfIn PDF document text
    • http://limoride.net/gallery/file/kopaxolawuteroxebi.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098b57840463---38433340724.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=que+significa+concentracion+de+hemoglobina+corpuscular+mediaPDF 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_off00010bb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BB8 19564 bytes
SHA-256: 209b060a6c32794eb58fb168defa285d6404421260effc7edf28f800a9d96bec
font_01_sfnt_off00013d80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D80 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015597.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15597 11364 bytes
SHA-256: b07ed5df3bedaf375dba4c15d5309e4eef00f2a43468729fd7b889f057834589

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