MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.007 JavaScript
The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous links to compromised WordPress sites, suggesting it's part of a link farm designed to redirect users to malicious content. The primary URL, https://crewmak.ru/uplcv?utm_term=ucn+mobile+download, likely serves as the final destination for downloading a secondary payload.
Machine Learning
- Nyx PDF Classifier malicious score 0.9998
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://crewmak.ru/uplcv?utm_term=ucn+mobile+download PDF link annotation
- http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607874f68f4cc---87553118098.pdfIn PDF document text
- https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/7fd32ad65924ba61925a707cc6d1e9b1/47523929308.pdfIn PDF document text
- https://tripleccompanies.com/wp-content/plugins/super-forms/uploads/php/files/c197949485e8bc2f626f4b23df8cfa0f/53536593394.pdfIn PDF document text
- https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/d54c6m44grcvlj1iuu7uhnpk94/13313754106.pdfIn PDF document text
- http://centroolosprato.it/userfiles/files/53714617121.pdfIn PDF document text
- https://rittenhousesmiles.com/wp-content/plugins/super-forms/uploads/php/files/4b77f1a1d37aeb3accb675a5ca1028b3/66100801846.pdfIn PDF document text
- http://randalljroutson.com/clients/44711/File/pobafakuwarimaju.pdfIn PDF document text
- https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/b818914dfb7b947792b53d085597ed1f/3664655358.pdfIn PDF document text
- http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d646b0e985---50260377863.pdfIn PDF document text
- https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/fa78c171a7564caf70b90c20e37bf8ed/pisedoresikataw.pdfIn PDF document text
- http://zonazero.es/userfiles/file/2966342193.pdfIn PDF document text
- http://surtek.biz/image/files/20150127_201743.pdfIn PDF document text
- https://btsmstlucia.com/atomicsteps/upload/userfiles/file/worilulude.pdfIn PDF document text
- http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b07e88757a3---xolaxadatokeregigovemuj.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text
Extracted artifacts 3
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0000e31c.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE31C | 5032 bytes |
SHA-256: e0b8bd1c6401ecdced11d6d3284d90fa1e76992338997dfd48602d5e992252bb |
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font_01_sfnt_off0000f439.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF439 | 10832 bytes |
SHA-256: 1d0635dda87903a52caf6737bdcdbbdee7bf4b046492d9b903d0721d4b87f484 |
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font_02_sfnt_off00011955.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x11955 | 1736 bytes |
SHA-256: 5095ccdfdd328c3f25b1766e9c65bca58fa839170fcb9f3db3c20e130d955aff |
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