PDF malware analysis — malicious · dc5a4047d05c9141

MALICIOUS

PDF

53.2 KB Created: 2021-09-05 22:51:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 8955d553175ed27d5ae2c33cbdf17687 SHA-1: 7f948aa2653c86b293321989449577166f3c5619 SHA-256: dc5a4047d05c9141268961bbe206228307cde0fa672b87ad7651f82efbb14fde

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The sample is a PDF document detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple compromised WordPress upload storage locations and other disposable hosting, suggesting a phishing or malware distribution attempt. The PDF's structure and embedded URLs indicate it's designed to redirect users to potentially harmful sites.

Machine Learning

Nyx PDF Classifier malicious score 0.7484

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://stmarys-perthamboy.com/upload/File/pozotujimuxi.pdf In PDF document text
- http://decamiones.com/userfiles/file/73546415697.pdfIn PDF document text
- http://milwaukee.center/userfiles/file/nazademupez.pdfIn PDF document text
- https://akemi.ro/hirek/file/53374880493.pdfIn PDF document text
- https://btcauction.vn/hinhanh/file/80208539912.pdfIn PDF document text
- https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/hnnm7bc7tkge698pa459014615/77627435977.pdfIn PDF document text
- https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/e7f8f2bba5bfd5e02fb35459c064e3bc/gugiteli.pdfIn PDF document text
- http://studiorumeo.it/userfiles/files/15861448003.pdfIn PDF document text
- https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/1780acdf228256ebd9877a81d80eb3fc/99019179448.pdfIn PDF document text
- http://bjdfszwy.com/filespath/files/20210813155324.pdfIn PDF document text
- http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa35d2f95f---mikixudafovikumilireta.pdfIn PDF document text
- http://www.apsetedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160723f716bc6a---jeborunifivegima.pdfIn PDF document text
- http://www.protectakoteasia.com/ckfinder/userfiles/files/fakamotivemaruxipe.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=neurogenic+bladder+treatment+pdfPDF link annotation

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