Malicious PDF — malware analysis report

Static analysis result for SHA-256 90207d5a409bca53…

MALICIOUS

PDF

70.3 KB Created: 2021-09-04 01:04:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: e1d80e16a2325a2ce2bf7b93ce62348a SHA-1: 41a8bc98dd7525fce0c66677bbedd10e62ec1bd0 SHA-256: 90207d5a409bca53428d7559237959046588de4baeebf8d131512896a80a2efa
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a link farm pointing to numerous websites, many of which are hosted on compromised WordPress installations. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The embedded URLs suggest the document is intended to lure users into clicking malicious links, potentially leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9130

Heuristics 5

  • 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
  • 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://coretry.ru/uplcv?utm_term=modello+curriculum+vitae+europeo+download+pdf PDF link annotation
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/k8i06vup596e5kn8eee2me25nb/34965661839.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160e905c9eef38---zumujejub.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/54391052129.pdfIn PDF document text
    • http://sapaethnic.com/webroot/img/files/pisoxobatig.pdfIn PDF document text
    • https://tecnibat.net/uploads/archivos/fewugafewimavanobelometi.pdfIn PDF document text
    • http://kasystemofkarate.com/clients/861259/File/52637803986.pdfIn PDF document text
    • https://festival-bg.com/media/ckuploads/files/temafibirekino.pdfIn PDF document text
    • https://www.helmmsp.ca/wp-content/plugins/super-forms/uploads/php/files/242cafc722020f73eb81d28ef7ed6432/xafaxuvupemola.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/161250e733f833---zivikovapotetivilamomuk.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160dda5e4d20aa---gepeba.pdfIn PDF document text
    • http://pincailight.com/zk/UploadFile/file/2021080218522773499.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/r56s4n3v1sgctqjdne91asu64t/73675913271.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/d6c931cd80df663acfa10571ff1d30dc/vegesirune.pdfIn PDF document text
    • https://dtd.com.pk/ckfinder/userfiles/files/buzunajuwopadazup.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/203fea5f34571b504a579cad97ea55c0/18836667395.pdfIn PDF document text
    • http://www.vljainandco.com/userfiles/files/52533605187.pdfIn PDF document text
    • http://abimobiliare.pl/pliki/File/34702330281.pdfIn PDF document text
    • http://pnktools-th.org/ckfinder/userfiles/files/vakupike.pdfIn PDF document text
    • http://architettodrabeni.it/userfiles/files/wexurajofulebiguminu.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/70f4ef7012ee48042eae399b7c418fa1/zisufoka.pdfIn PDF document text
    • https://conexus-study-abroad-travel.com/ckfinder/userfiles/file/koxita.pdfIn PDF document text
    • http://tunesistudio.eu/userfiles/files/74922409836.pdfIn PDF document text
    • http://topnotchimports.com/ckfinder/userfiles/files/49281193969.pdfIn PDF document text
    • http://karlsbach.de/userfiles/files/98738550017.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d955.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD955 17508 bytes
SHA-256: 985f410f3b333745793fe5299938bb6faaa21470e9bd4d1d2cecd7afeb28da4b

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