Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d3c376c82bf4892…

MALICIOUS

PDF

59.7 KB Created: 2021-06-08 00:42:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: ad7ab99c22f8362fe412630eec14ef0a SHA-1: 3d8429d40e1b502a1c36c5e56d84ac8ba0b8b2a1 SHA-256: 3d3c376c82bf489267199b89e69b97f4df6ba6de894feb466684681cc0c4a53c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting a phishing or malware distribution campaign. The ClamAV detection and ML classifier further support its malicious nature. Although no scripts were explicitly extracted, the PDF structure and embedded URIs indicate it's designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6973

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://infrive.ru/uplcv?utm_term=to+kill+a+mockingbird+movie+analysis+essay PDF link annotation
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/6543f1d04238c2b74c22445f7fa0fa67/jirowebomepivoxulitefuvuj.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/lund5j6cu4kcdc47jmsanktgmd/80147275334.pdfIn PDF document text
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/bdb2b2f1c9cccb6a3b0d3b026ffb908f/negiwovulajozaderakivi.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9c283ef0f9---39525183788.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/hcqrm6euemkfvs287prspg7e70/gawuw.pdfIn PDF document text
    • https://agrachoff.ru/wp-content/plugins/super-forms/uploads/php/files/5f0e174c86fcdc9d9aa47a333407447c/88085954246.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099ce39b6863---zomafitar.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1607e636a9c967---juzutibegiperibuvoladel.pdfIn PDF document text
    • http://aodaibooking.com/FileData/ckfinder/files/20210530_D73481F8F49FD801.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609ed6007847b---49414285056.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160aa598239854---lofokotorovefoxapuped.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160738cce89e23---zunumewexuzuz.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/1606f914516e6a---vipitejuxadokilariweta.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/d586890a2a6e27349ce7c41904653201/4015315865.pdfIn PDF document text
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/2ff3e1780bbd2ca7efd41c057d33c090/31427428990.pdfIn PDF document text
    • https://www.electriclighting.com/wp-content/plugins/super-forms/uploads/php/files/1ab0506caff407df2ff09937875d17be/dijixujibolidibelo.pdfIn PDF document text
    • http://lubrifianti-auto.ro/files/file/purasexo.pdfIn PDF document text
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/3p16s2braur49rpm1jdb049v7i/76986534117.pdfIn PDF document text
    • https://www.marvistasales.com/wp-content/plugins/super-forms/uploads/php/files/631efc37edf525cce54dd95fc89b360d/jifewogerinafanufawivufog.pdfIn PDF document text

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