PDF malware analysis — malicious · 19418d50fe85a02a

MALICIOUS

PDF

60.9 KB Created: 2021-09-15 17:47:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 598c17d29058ef6f54f191e0532ed2e8 SHA-1: e4fb96c6e60c13845bd398755710fc43084d12f3 SHA-256: 19418d50fe85a02ae5f129bb4a01a648dccca59334a00c65679a4fda5037c29c

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to disposable domains and exhibiting characteristics of a link farm. The ClamAV detection and ML classifier indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.7685

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK

PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
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://wastran.ru/uplcv?utm_term=is+forscore+available+for+android PDF link annotation
- http://asvpp.fr/pdf/33700105404.pdfIn PDF document text
- https://alusol-kw.com/ckfinder/userfiles/files/57125205467.pdfIn PDF document text
- https://emotionalgift.youngzonejewelry.com/ckfinder/userfiles/files/27878111461.pdfIn PDF document text
- http://lucidarepavimentimarmogenovaealessandria.it/userfiles/files/50530194810.pdfIn PDF document text
- http://falcon.dk/sites/default/files/webfm/nitoduwekumis.pdfIn PDF document text
- https://www.moxiclear.com.au/application/third_party/ckfinder/userfiles/files/puzuxaxivijepik.pdfIn PDF document text
- https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/oghdg06j7281tpbb1c9upqbj7i/94876820330.pdfIn PDF document text
- http://phulieumaymacbaoco.com/hinhanh_fckeditor/file/97465026368.pdfIn PDF document text
- http://amsasecretariat.fr/userfiles/file/50111479439.pdfIn PDF document text
- http://akgwealthplanner.com/crm/files/nafefenotetalafabi.pdfIn PDF document text
- http://autobedrijvenindex.nl/images/uploads/79084688526.pdfIn PDF document text
- http://murielbellhomes.com/userfiles/files/zimavuvugozejekugi.pdfIn PDF document text
- http://riasztoszolnok.hu/admin/fck_upload/file/36465439223.pdfIn PDF document text
- http://gelateriacool.it/userfiles/files/wowaxudixojejezokamisisok.pdfIn PDF document text
- http://media-production.net/admin/ckfinder/userfiles/files/50250758478.pdfIn PDF document text
- http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130e5c936ee4---62048499956.pdfIn PDF document text

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