Malicious PDF — malware analysis report

Static analysis result for SHA-256 743c23b6a0787613…

MALICIOUS

PDF

73.1 KB Created: 2021-09-01 22:28:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 1c3dcff17ece2c0a8205ceebd7fd44ff SHA-1: da8ce095a1144056eb767e6b8f6ca25790148a50 SHA-256: 743c23b6a078761357e75997676727d90bdb34202bdfc19f5fa9ff6a08732676
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites acting as a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8703

Heuristics 5

  • 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
  • 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://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/61cc93e2f07719a974552980d07e8aeb/80097698267.pdf In PDF document text
    • http://cobbpaynefamilyreunion.com/clients/862770/File/mewomizoxumi.pdfIn PDF document text
    • https://eurotig.ro/file/todafoworumosejapalot.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607e49af89551---33444324625.pdfIn PDF document text
    • https://polymadeniyaglar.com/fckeditor/userfiles/file/rafawesegu.pdfIn PDF document text
    • http://poorclarescork.ie/images/dababukibidomagali.pdfIn PDF document text
    • http://chandravanshi.com/userfiles/file/51545895228.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/9ae6886319eb0f83b68d149be1cbef3c/61045732691.pdfIn PDF document text
    • https://alice-immo.com/userfiles/file/42099339970.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c17dccacc0b---jevogekoxuporav.pdfIn PDF document text
    • http://ibshospitals.com/userfiles/file/86384016575.pdfIn PDF document text
    • http://tetraeng.it/userfiles/files/gubemapuvi.pdfIn PDF document text
    • https://pmfegypt.com/userfiles/files/57341190424.pdfIn PDF document text
    • http://bethelhanberryaaa.com/clients/2/24/2465ef4bb9bb1b7382310ae17d7cafeb/File/ribajebujezujimudukigorom.pdfIn PDF document text
    • http://gezond-trakteren.nl/kasteel-doornenburg-img/bestandenfile/60509817837.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608927dfb3be3---kezuvid.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/bb7fa62a56477aaa2930539c3d752d2d/38192027755.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/da05ae4b8f5f78ee0fe699a5825b35f2/35428265047.pdfIn PDF document text
    • https://masini-de-ambalat.ro/images/userfiles/topidudepewiwudawu.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/197a09bcbac28cae6e7bc29ab6afdd42/kexojipewefaxulabela.pdfIn PDF document text
    • https://creativenursery.net/home/creative/public_html/ckfinder/userfiles/files/tenelopetotovalalefapibif.pdfIn PDF document text
    • http://www.srijonihealinghome.com/fckimages/file/8929732047.pdfIn PDF document text
    • https://stollerco.com/testingsites/advantage_aviation/assets/media/file/90093356637.pdfIn PDF document text
    • https://saleskerala.com/ckfinder/userfiles/files/sulix.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/6f004a74e00537d05b4677a171ac9490/76792637947.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=cooking+brats+on+charcoal+grillPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f70c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF70C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010f23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F23 10640 bytes
SHA-256: aae8389a612a75c9b217c5522e7533ae390bcbe998ee535589a0ae1a0a90c1c3