MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The PDF file was identified as malicious by a ClamAV detection and an ML classifier. It contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting it functions as a link farm. The primary purpose appears to be directing users to potentially malicious content hosted on these compromised sites, likely for phishing or further malware delivery.
Machine Learning
- Nyx PDF Classifier malicious score 0.9990
Heuristics 6
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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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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://chcial.ru/uplcv?utm_term=twinkle+twinkle+little+star+sheet+music+piano+pdf PDF link annotation
- http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608e13b936179---7865130448.pdfIn PDF document text
- http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609611b6ae84b---nunazidisomilugugarosof.pdfIn PDF document text
- https://repare-ton-smartphone.com/userfiles/file/91425783138.pdfIn PDF document text
- https://mmagame.com/userfiles/file/filajuzurop.pdfIn PDF document text
- https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/e7dfeec795602c2041429626c050c05e/navaxujusiroxosuz.pdfIn PDF document text
- https://aljazeerahdrilling.com/userfiles/files/41834510881.pdfIn PDF document text
- https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/h7itc3iaoeb0bne0b3k99daev7/41766137169.pdfIn PDF document text
- https://www.ideaklinikbursa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160737f0d6dfbd---3723635989.pdfIn PDF document text
- http://www.valaisconsulting.ch/file/3636148056.pdfIn PDF document text
- http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160f9977f85f49---nuluzenep.pdfIn PDF document text
- http://bigxra.com/uploadfile/file/2021052800212373499.pdfIn PDF document text
- https://ncsccalgary.com/userfiles/files/xajipubiwulega.pdfIn PDF document text
- https://linardi.ru/files/file/29766578027.pdfIn PDF document text
- https://vvpta-irvine.org/userfiles/file/vixataponuru.pdfIn PDF document text
- http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b99fb07cf5c---vojulesimonatepimovage.pdfIn PDF document text
- http://sbnjl.com/userfiles/files/fomox.pdfIn PDF document text
- http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609055de58cee---bafovozuroj.pdfIn PDF document text
- http://dieta-plus.pl/userfiles/file/rarabifojagulu.pdfIn PDF document text
- http://haiphongcontest.com/images/files/56139582832.pdfIn PDF document text
- http://clear-es.net/yamituki-n/uploads/files/86449948627.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_off0000e21a.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE21A | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_01_sfnt_off0000fa31.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xFA31 | 11124 bytes |
SHA-256: bb3a7e5725beec0c1b630e404f1675cb901f49e969f973125e829a1065908944 |
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font_02_sfnt_off00011402.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x11402 | 18796 bytes |
SHA-256: b5c5f868a0446bf6c0300ea25f234e801760145b979b7140b15515f2879cb3cb |
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