MALICIOUS
176
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains a large number of embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content or phishing pages. The presence of external URI firings and the overall structure strongly suggest a phishing or malware distribution campaign.
Machine Learning
- Nyx PDF Classifier malicious score 0.9756
Heuristics 7
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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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QR-code redirect lure medium SE_QR_LUREDocument instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
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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://synerhu.ru/uplcv?utm_term=sepsis+and+hyponatremia
- https://stvorki.ru/files/file/fulibugizuzirurunariluru.pdf
- http://atenngo.com/admin/sites/site/documents/zezotike.pdf
- http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160724a2d1d310---dinuruxodepururokituvi.pdf
- http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160906129363e4---13327042681.pdf
- http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/4ba1f2d6123de5f0cb1892542c5d9aa2/17069837325.pdf
- http://hasanmasat.com/ckfinder/userfiles/files/jomaxovifokasugenoxiruk.pdf
- https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bbac938b81---gurubexoj.pdf
- http://podiummoda.ru/userfiles/file/kifobami.pdf
- http://gchsclassof1970reunion.com/clients/6/6a/6a45fbe13d63dbb0eb8070d7cb9dbc89/File/40563455286.pdf
- https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/914adf698987d624b2dc293a2fdbdd35/17605480426.pdf
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087b5e62b66d---64134714328.pdf
- https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/44c5439445c155cb69a91a6761580ed3/wuwenalodoxi.pdf
- http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608aeb74056c8---14080829727.pdf
- https://aslimitada.com/userfiles/file/26894748904.pdf
- http://casaperferiesantamariagoretti.com/writable/public/userfiles/file/sojoxixelifinurotud.pdf
- http://roxburyhs1987.com/clients/63080/File/28802426031.pdf
- https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/fc4f986f75a65616afdeab4f4bee2ccf/60368435821.pdf
- http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/70aa58ad986a8080b35e0fb79ba36b85/rikurudixim.pdf
- https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1ddcc7aba---24349914800.pdf
- https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160810428aac63---vemejogojaromesuvozaxife.pdf
- http://tfh-filter.hu/_user/file/rumagomobotanuxumeket.pdf
- http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160b315459652a---35543479939.pdf
- http://curry-box-deluxe.de/userfiles/file/wakegofoduzumas.pdf
- https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/aeb697d763f23c11ec8f2c08d325fd6e/90663548427.pdf
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/xap/1.0/rights/
- http://dejavu.sourceforge.net
- http://dejavu.sourceforge.net/wiki/index.php/License
Extracted artifacts 4
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0001dcc8.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x1DCC8 | 16792 bytes |
font_01_sfnt_off0001f4df.bin967e6f1a0564ec925370801d866547399c7796cedf3f72e923dbdba93710aea3 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x1F4DF | 10800 bytes |
font_02_sfnt_off00020d90.bin4cd2b1fdc62dd91d400509d655ad6d7bf6f8c7dd8db1b9bcd30c2415b891244b |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x20D90 | 19604 bytes |
font_03_sfnt_off00024046.bin81d65c303ba420755e635b9239f5f5cf450e34936ca0f12c545d607772992159 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x24046 | 16064 bytes |
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