PDF malware analysis — malicious · 5c981a06ca2430b6

MALICIOUS

PDF

64.0 KB Created: 2021-08-14 14:52:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: a807d96cf7392668961351286e182a92 SHA-1: 350c8cf3ed4c92bd00e9df77f31a9ec28b7e488e SHA-256: 5c981a06ca2430b6ccbeffd7be23f14f2649280eb11a478852db4f3f09f6161c

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, indicating a link farm designed to obscure the ultimate destination. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. The presence of multiple links to potentially compromised WordPress sites suggests an attempt to leverage legitimate infrastructure for malicious purposes.

Machine Learning

Nyx PDF Classifier malicious score 0.9367

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://hmanagement.net/userfiles/file/81782194739.pdf In PDF document text
- http://thevelascofamily.com/clients/11614/File/49355118742.pdfIn PDF document text
- http://architetturaurbanistica.it/userfiles/files/48790029036.pdfIn PDF document text
- http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607433e9c06a8---45274012100.pdfIn PDF document text
- https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/16112bb4b1aacd---lopesutibabonebelaxuna.pdfIn PDF document text
- http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6a330049a2---satusuduzaziku.pdfIn PDF document text
- https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160929c694d9bb---rezabivakikufavulekojetow.pdfIn PDF document text
- http://dhs1959reunion.com/clients/871764/File/kuvupovasezon.pdfIn PDF document text
- http://28777886.com/Lpf/UPFILE/userfiles/files/mikimufarituxaruwefewe.pdfIn PDF document text
- http://aokisuper.com/ckfinder/userfiles/files/86732455547.pdfIn PDF document text
- http://pogotowienaukowe.com/Upload/file/letakafimutofeje.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=apk+binomo+versi+lamaPDF link annotation

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