Malicious PDF — malware analysis report

Static analysis result for SHA-256 07f7af60d111cdbd…

MALICIOUS

PDF

81.9 KB Created: 2021-09-02 21:56:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: ea8d203e594f49ec33ebb3c0fb8af807 SHA-1: deb5ee3217d8e713a8339c84b7e98af0a7b86a6f SHA-256: 07f7af60d111cdbd3412d25a2ffa676309bc7d870a7873f84ad8bdd453501d81
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to various domains, many of which are identified as disposable hosting or compromised CMS uploads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The structure suggests a link farm designed to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://duetsepolno.pl/userfiles/file/deraxiguva.pdf In PDF document text
    • https://coluer.ir/documents/file/17344839567.pdfIn PDF document text
    • http://accronline.com/userfiles/file/24106404418.pdfIn PDF document text
    • http://king-tableware.com/uploads/files/202108290535274719.pdfIn PDF document text
    • http://ascensionchina.com/userfiles/file/10343724453.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/8s62jflds5166h60nost8i9qmp/lisexukunijewoseresulim.pdfIn PDF document text
    • https://dodatkireklamowe.pl/web/uploads/files/41279530633.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160721cd9c850b---20063396307.pdfIn PDF document text
    • http://aucoindeshalles.com/menu/file/luligizegosi.pdfIn PDF document text
    • http://lamekatus.ee/uploads/ckeditor/files/9986638503.pdfIn PDF document text
    • https://ringid.vn/ckfinder/userfiles/files/zadasavipijazubefuwiwusij.pdfIn PDF document text
    • http://ricoconsultingattorney.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/25962870230.pdfIn PDF document text
    • http://xn----8sbxab3abskk3a2j.xn--p1ai/media/file/80912896415.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/tucoln2qr4sh415tlsomh0pd65/zenimosedavutep.pdfIn PDF document text
    • http://hillcountryawningsandsunscreens.com/wp-content/plugins/formcraft/file-upload/server/content/files/160725727e0adf---wubonajive.pdfIn PDF document text
    • https://sikanderajam.com/Robinson/ckfinder/userfiles/files/55367053301.pdfIn PDF document text
    • http://bronia.org/userfiles/file/62178029015.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160dd78aa2fdb5---zonul.pdfIn PDF document text
    • http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608909bcca802---kebopepifa.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/49ee16c45acc5cabfaf452e4a29d700a/1870455361.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080dced616ea---21820237045.pdfIn PDF document text
    • https://agriplan-rs.com/dados/ckfinder/files/juzoxulorado.pdfIn PDF document text
    • http://richmore.kr/uploadfile/fckeditor/file/xedoranozagepakowotovazim.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=oxford+school+atlas+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_off0000d9d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9D7 10516 bytes
SHA-256: fdc54a53bc943839996b29795b6d3c4b780501f466df235c8d5d2e082a4f05d3
font_01_sfnt_off0000f1fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1FC 18544 bytes
SHA-256: b5b941fb480196686fba069559eca96aa5639ccdd863c5ed9987101259d00ae6
font_02_sfnt_off0001229b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1229B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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