Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b80d07e2d4eeaba…

MALICIOUS

PDF

86.6 KB Created: 2021-09-02 00:07:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 5b45f68cce9018c5b88900f2b3958cfa SHA-1: b9a29b900564e828e17b4015fed0576b9f50c715 SHA-256: 2b80d07e2d4eeaba24a4ade2f3843e87c6073d63595f025e3284b44a6898e29c
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the PDF structure itself is indicative of a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/939145468abb0afc0a366baa23fc717b/kawitusemupuzevi.pdf In PDF document text
    • http://sprostredkovanieuverov.sk/res/file/wejij.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160cdd39c8cc34---tivufobo.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/52242973099.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081677fce832---58661590959.pdfIn PDF document text
    • https://marblobaths.ph/app/webroot/img/files/samenokenixemedawuzok.pdfIn PDF document text
    • http://goodtraefarm.com/ckupload/files/sixotob.pdfIn PDF document text
    • https://belhasasecurity.com/userfiles/file/66297946219.pdfIn PDF document text
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/684c861eab7000c85aa79486385b2008/zixezamuzexozudino.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609249ffc0ed7---vetewanulogalatodifu.pdfIn PDF document text
    • http://nyett.hk/uploads/news/files/92543598119.pdfIn PDF document text
    • http://www.cemeba.com/uploads/ckfinder/files/38749917182.pdfIn PDF document text
    • http://fecoil.com/userfiles/file/11835212077.pdfIn PDF document text
    • http://royalgroup.at/tmp/98702016384.pdfIn PDF document text
    • https://tangentemag.com/img/file/dotudezalupat.pdfIn PDF document text
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/160c12ca848720---jujiluvonoronoxur.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160e023b0ef108---toxivunopoge.pdfIn PDF document text
    • http://stilistspb.online/public/files/uploads/files/tituge.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/amoihiuodosajrav18e527n5o2/81915342050.pdfIn PDF document text
    • https://esterkins.de/ckfinder/userfiles/files/13205783368.pdfIn PDF document text
    • https://tannhatviet.vn/upload/files/mexafupopupawilawixaze.pdfIn PDF document text
    • http://khacvietlaser.vn/public/images_news/files/vuxuxekum.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/161290bb113bca---texapojavudisipulaveze.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088ef23a5ec2---72684840716.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/151a276ceec46311c2d4f3a8cb183bc8/44358100950.pdfIn PDF document text
    • http://cukorbetegshop.hu/files/31809413750.pdfIn PDF document text
    • http://trustycctv.com/ckfinder/userfiles/files/pivotoxesutewewe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=best+call+log+backup+app+for+androidPDF 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_off0000ec8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC8E 11180 bytes
SHA-256: 8abf34677ca3e38f38566e8790119c39a8eb4ffbcfa6baad7ba745745423ff9e
font_01_sfnt_off0001066d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1066D 17308 bytes
SHA-256: 1dec0878dd1f5df108481012bbabae901903f8b1af2f191d53476a9e45f718a9
font_02_sfnt_off00013355.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13355 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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