PDF malware analysis — malicious · 8cc9352af9e337ce

MALICIOUS

PDF

80.0 KB Created: 2021-09-23 02:09:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21

MD5: 5046009f02f9d4db5dc7208837557e5d SHA-1: 2cd07630cdc955ebb643c3a1f428029384d4c787 SHA-256: 8cc9352af9e337ce3903318b5292b33348686287eb387c99c171751bb9983e2b

124 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs pointing to disposable domains, characteristic of a link farm designed to obscure the ultimate destination. The ClamAV detection and ML classifier strongly 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 0.7589

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 https://catamma.ru/uplcv?utm_term=find+the+first+five+terms+of+the+sequence+of+partial+sums+calculator PDF link annotation
- http://cga82.com/admin/File/migijemadivudadoneninuve.pdfIn PDF document text
- http://duepassidalcentro.it/userfiles/files/kovoforameluwakixexote.pdfIn PDF document text
- http://sunway.me/uploads/file/211646472843.pdfIn PDF document text
- https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/7a62f1c1d7b421f7d8931c37cc31aeee/gowujulupudaraloxaruw.pdfIn PDF document text
- http://hoteldanang.com/uploads/images/files/70909093128.pdfIn PDF document text
- https://fiscalonline.eu/app/webroot/files/userfiles/files/xazolibupumazuduvavobi.pdfIn PDF document text
- http://vttbyt-bvmnpbqn.com/ckfinder/userfiles/files/muwoguzutewo.pdfIn PDF document text
- https://www.jakketoes.be/ckfinder/userfiles/files/12324012859.pdfIn PDF document text
- http://ohdiabo.net/images/ckeditor/files/47481473955.pdfIn PDF document text
- https://linardi.ru/files/file/42823277273.pdfIn PDF document text
- http://malabarisproducoes.com/arquivos/files/novuf.pdfIn PDF document text
- https://cuatudongsaigon.net/uploads/files/45246849039.pdfIn PDF document text
- https://canoe.ro/Extras/ckfinder/userfiles/files/89591911339.pdfIn PDF document text
- http://miraesusan.com/ckupload/files/51781367261.pdfIn PDF document text
- https://pima-alarms.rs/slicice/file/gepekamaxoledupodem.pdfIn PDF document text
- http://yearbookplus.com/uploads/ckfinder/files/zipomusiwaligu.pdfIn PDF document text
- https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613ac742862b0---92825080300.pdfIn PDF document text
- http://owop.challengersports.com/ckfinder/userfiles/files/98897449770.pdfIn PDF document text
- https://shastriratanchatterjee.com/ckfinder/userfiles/files/nuratujofupaw.pdfIn PDF document text
- http://fc-junajted.com/upload/datoteke/81201233390.pdfIn PDF document text
- http://gs-metals.com/filespath/files/20210912164836.pdfIn PDF document text
- http://www.huescalamagiaenfotos.com/userfiles/files/pujasaforixogetomote.pdfIn PDF document text
- https://altsovmun.ru/userfiles/file/35965870699.pdfIn PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000df78.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDF78	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000f78f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF78F	11172 bytes
SHA-256: `03187eec7174432e78bb05b430212cd02dcb2046e008ca5c15c35ebd85e72579`
`font_02_sfnt_off0001113f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1113F	18664 bytes
SHA-256: `b4608f91da05badf102636612a4f11173f3ceef9f5f6e05d9289234469942367`

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