PDF malware analysis — malicious · cb0103751233c84b

MALICIOUS

PDF

72.3 KB Created: 2021-09-09 11:49:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 07cf24700031b3be96f58250dc2dca4d SHA-1: 9e425192505ba9c8fd4e95cf5a36c56ee3741d86 SHA-256: cb0103751233c84bceb18b326664bafec168ea98f116beea94ecb9eaedaf1d9d

124 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The PDF contains numerous embedded URLs, many pointing to potentially malicious domains, and is structured as a link farm. The presence of external URI firings suggests the document is designed to redirect users to external content, likely for phishing or to download further malicious payloads.

Machine Learning

Nyx PDF Classifier malicious score 0.8295

Heuristics 4

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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 http://agama-rc.com/upload/files/piparimowiwekomixepefunor.pdf In PDF document text
- http://korvet-sp.ru/userfiles/file/24671924068.pdfIn PDF document text
- http://rivebistro.net/ckfinder/userfiles/files/31322028304.pdfIn PDF document text
- https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/21015019676075c9c835e1857d874b54/45503701698.pdfIn PDF document text
- http://hmed.vn/upload/files/80642944935.pdfIn PDF document text
- https://cyberbirddog.com/userfiles/files/vafodixal.pdfIn PDF document text
- https://mbbs.hr/files/55296428353.pdfIn PDF document text
- http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/161390d404b233---78569291678.pdfIn PDF document text
- https://cristalparkhotel.com/ckfinder/userfiles/files/63341520604.pdfIn PDF document text
- http://plnjl.com/userfiles/files/jopuraxiner.pdfIn PDF document text
- http://sgadsahodayatarntaran.org/sahodyatarntarannew/userfiles/file/sesenipujir.pdfIn PDF document text
- http://cw-cut.com/uploads/file/87841980404.pdfIn PDF document text
- http://vansuloi.com/uploads/userfiles/file/24798357824.pdfIn PDF document text
- https://pelletier-tp.fr/ckfinder/userfiles/files/subekimajetokepubet.pdfIn PDF document text
- https://dichvumayphoto.vn/webroot/img/files/23387916012.pdfIn PDF document text
- http://salespate.com/userfiles/file/jozupi.pdfIn PDF document text
- https://shastriratanchatterjee.com/ckfinder/userfiles/files/54484029649.pdfIn PDF document text
- http://shethof.ch/cgi-bin/dynamisch/file/80854632932.pdfIn PDF document text
- http://viral-list-machine.com/ckfinder/userfiles/publics/files/17707850498.pdfIn PDF document text
- http://www.cafeinca.com/img/public/contenido/file/89553503527.pdfIn PDF document text
- http://www.sas.edu.mn/ckfinder/userfiles/files/73299374709.pdfIn PDF document text
- https://chokysitohang.com/Uploads/userfiles/files/pirijurol.pdfIn PDF document text
- http://sys-svinding.dk/userfiles/file/selojizusivab.pdfIn PDF document text
- http://nhatrangpalace.vn/app/webroot/upload/files/muvodumabafatefus.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=hide+pics+in+galleryPDF link annotation
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000cda9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCDA9	10576 bytes
SHA-256: `d7f012910547068075037107b1b4addc038b95f8fbf81b55f94cba5be7b73414`
`font_01_sfnt_off0000e59d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE59D	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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