MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple external URLs, some hosted on compromised WordPress sites. The presence of numerous PDF links and the use of 'utm_term' parameters suggest a phishing or malware distribution campaign.
Machine Learning
- Nyx PDF Classifier malicious score 0.9977
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://ketchas.ru/uplcv?utm_term=install+chrome+os+on+samsung+tablet PDF link annotation
- https://apatity.verlauf-ekb.ru/admin/ckfinder/userfiles/files/82354919671.pdfIn PDF document text
- http://zawodydrwali.pl/app/webroot/userfiles/file/jolurezaxub.pdfIn PDF document text
- http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/161342a638e654---vavon.pdfIn PDF document text
- http://lynhuagiasi.com/Images_upload/files/82608428151.pdfIn PDF document text
- http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613659b653793---40513332781.pdfIn PDF document text
- http://msmzizkov.cz/data/dokumenty/fibabiruzazofogajir.pdfIn PDF document text
- http://vmkmsz.hu/userfiles/file/vexowosagakovugipu.pdfIn PDF document text
- http://surmounttravel.com/userfiles/files/vojizudujanusazupedaro.pdfIn PDF document text
- https://hongming-eco.com/userfiles/file/vejumevetunofomevezola.pdfIn PDF document text
- http://arisutour.com/ckupload/files/12887825760.pdfIn PDF document text
- http://bajajsports.com/userfiles/file/27216063161.pdfIn PDF document text
- http://www.euro-fly.eu/userfiles/files/52120363617.pdfIn PDF document text
- https://bbu.vn/Images_upload/files/simitafadavo.pdfIn PDF document text
- http://mintaialuminum.com/d/files/zufewaxemiwirafigifa.pdfIn PDF document text
- http://www.lukoilmarine.com/ckfinder/userfiles/files/36824960692.pdfIn PDF document text
- http://ldkxzzs.com/images/userfiles/file/latusobogov.pdfIn PDF document text
- http://phuquytravel.com/nguyenvanlinh/files/razodezomozetopuxesala.pdfIn PDF document text
- http://studiotecnicolamanna.com/userfiles/files/tejebujiduzubiregokove.pdfIn PDF document text
- https://kildevangen.dk/files/bopunoravoxunixi.pdfIn PDF document text
- http://sipzip.com/userfiles/file/putetuminokekurix.pdfIn PDF document text
- https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/c65f80fd55426e027341c54836f0bd14/62979962993.pdfIn PDF document text
- http://elhammagazine.com/ckfinder/userfiles/files/rijosememomivef.pdfIn PDF document text
- http://potya.com/83369931692.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_off0000e136.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE136 | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_01_sfnt_off0000f948.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF948 | 17680 bytes |
SHA-256: 76c4c259acc55e6f13c39d3b25397f581fa17b5e2865abfbfa2a20703fbb3238 |
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font_02_sfnt_off00012736.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x12736 | 10776 bytes |
SHA-256: 6eedbb74dbf53d654ea7ea36c94b1246f66a3d10d7516ea62d13a6f9a2128e51 |
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