MALICIOUS
126
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of numerous external URIs, many of which are structured as link farms with UTM parameters, suggests a phishing or malware distribution campaign. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating the document is designed to host many links on disposable domains. No scripts were extracted, but the overall structure points to a malicious document designed to redirect users to potentially harmful content.
Machine Learning
- Nyx PDF Classifier malicious score 0.9947
Heuristics 5
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ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTIONClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARMSmall 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.
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External URI info PDF_URIPDF contains an external URL action
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Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTALThe same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
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Embedded URL info EMBEDDED_URLOne 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://krisoc.ru/uplcv?utm_term=a+tour+of+c%2B%2B+second+edition+pdf PDF link annotation
- https://1tlstar.com/storage/uploads/files/bedogopaserepalu.pdfIn PDF document text
- http://qianxi.cn/filespath/files/20210901075344.pdfIn PDF document text
- https://rieker-consulting.eu/files/file/87446048549.pdfIn PDF document text
- https://adian.eus/files/galeria/files/45345136774.pdfIn PDF document text
- http://banglenhospital.com/UserFiles/File/sanome.pdfIn PDF document text
- https://highendteen.com/userfiles/files/89958357999.pdfIn PDF document text
- http://degeninhotel.ru/admin/ckfinder/userfiles/files/46401360672.pdfIn PDF document text
- https://visualmotion.nl/uploads/file/nalalanilob.pdfIn PDF document text
- https://adeptos.clevercloud.pt/images/items/files/45389751647.pdfIn PDF document text
- https://habibitours.net/ckfinder/userfiles/files/79776974774.pdfIn PDF document text
- http://gimnazjum-krasiczyn.pl/img/userfiles/file/75488588090.pdfIn PDF document text
- http://www.texaco.bargiel.com.pl/ckfinder/userfiles/files/nokifix.pdfIn PDF document text
- http://gewald.ru/content/Files/zilovuruviwebolafupu.pdfIn PDF document text
- https://onderdurdu.com/upload/ckfinder/files/papofikisokebek.pdfIn PDF document text
- https://gimenezricarte-deltabogados.com/ckfinder/userfiles/files/80261007113.pdfIn PDF document text
- http://nhagiatxanh.com/public/default/ckeditor/files/mamovijukud.pdfIn PDF document text
- http://szyqjsj.com/UploadFile/file/20210911150241388.pdfIn PDF document text
- http://abakus-routing.co.uk/ckfinder/userfiles/files/kafapivavo.pdfIn PDF document text
- https://dreamscapes.ca/dream_scapes/userfiles/files/67201549587.pdfIn PDF document text
- http://goksirkrupskimlyn.pl/img/upload/files/kewusubidusu.pdfIn PDF document text
- http://www.tobywells.org/media/fckdir/file/kuvifixokiwopidumes.pdfIn PDF document text
- https://brihat-group.com/assets/userfiles/files/10239595665.pdfIn PDF document text
- http://seasonmediagroup.com/pic/file/73376475422.pdfIn PDF document text
- https://topinsolventa.ro/userfiles/file/gelutasetivomotuvanov.pdfIn PDF document text
- https://rougezenekar.hu/files/file/firukavobipopafapetanode.pdfIn PDF document text
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In 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_off0000b466.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xB466 | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_01_sfnt_off0000cc78.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xCC78 | 15148 bytes |
SHA-256: 6e57a5c8c24164aa23f1626e0402c41dd253421530d4c833b14f75bbd282b09d |
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font_02_sfnt_off0000f25d.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF25D | 10484 bytes |
SHA-256: 484dd40c7a35b33b28dddd17c6cdec4f4dea20fd3d895e2e5d577bad32564618 |
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