MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The PDF contains numerous embedded URLs, many of which point to disposable hosting or compromised CMS upload directories, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via a spearphishing attachment.
Machine Learning
- Nyx PDF Classifier malicious score 0.9968
Heuristics 6
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ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTIONClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARMPDF 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.
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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=bd+chaurasia+handbook+sixth+edition+pdf PDF link annotation
- http://soleilboo.com/images/uploads/files/56752139133.pdfIn PDF document text
- http://huthamcauquanggiap.com/upload/files/42556704975.pdfIn PDF document text
- http://cn-biyoute.com/d/files/derufozuj.pdfIn PDF document text
- https://zmiz.hr/userfiles/file/fowinikakaz.pdfIn PDF document text
- http://csc021.com/userfiles/file/20210917073434_hmfe51.pdfIn PDF document text
- http://gr-chem.com/upload/files/vazobabez.pdfIn PDF document text
- http://davidhammerstein.org/ckfinder/userfiles/files/36458576990.pdfIn PDF document text
- http://jinyezi.cn/upload/wonim.pdfIn PDF document text
- http://gomsuhoangminh.com/app/webroot/uploads/files/bobaxaniritaxuxewanaru.pdfIn PDF document text
- https://thehouseproduction.net/file/77218068397.pdfIn PDF document text
- http://dayuntang.com/assets/uploads/ckedit/files/20210912224024.pdfIn PDF document text
- http://leicesterbiketec.com/userfiles/file/rizina.pdfIn PDF document text
- http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/16144f91bb90fd---degudezesu.pdfIn PDF document text
- https://ichapps.peaceofworld.com/ichapps/ckeditor-ckfinder-integration/uploads/files/toliwisiwowatujefunur.pdfIn PDF document text
- http://palyavalaszto.hu/teszt/upload/file/geponosafonepob.pdfIn PDF document text
- http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143b01b9bfaa---47668145477.pdfIn PDF document text
- https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/e5714fcb5b5f76d2f99cd20f6ad7c1b1/vajeviwamuzexudolu.pdfIn PDF document text
- https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614405e7e5ae6---6237176833.pdfIn PDF document text
- http://fmmvn.net/userfiles/files/6820996550.pdfIn PDF document text
- https://iword.de/userfiles/file/birewagadowunejixeju.pdfIn PDF document text
- https://bitree.ru/ckfinder/userfiles/files/65442573650.pdfIn PDF document text
- https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/cf4238683dd3db3989ee2c616ae43257/fovopexiraboreroro.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_off0000cfd8.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xCFD8 | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_01_sfnt_off0000e7ef.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE7EF | 11160 bytes |
SHA-256: 2fece531fbacc69d0e3cca87dd64b11c609dee64749b7bf704cdee3411d90753 |
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font_02_sfnt_off000101cd.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x101CD | 18412 bytes |
SHA-256: eea244c4be7b783685b1864c0d8314b29d41d9a3388cb4e0d9cb775545a75a0d |
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