MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The PDF contains numerous embedded URLs pointing to compromised websites, identified as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or to serve a second-stage payload. The presence of multiple compromised CMS upload links suggests a tactic to host malicious content on seemingly legitimate but compromised infrastructure.
Machine Learning
- Nyx PDF Classifier malicious score 0.9978
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://synerhu.ru/uplcv?utm_term=farm+frenzy+for+windows+7 PDF link annotation
- https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614913d38203e---45533967640.pdfIn PDF document text
- http://laptopcuhaiphong.vn/upload/files/86981473138.pdfIn PDF document text
- https://rosenstein.lu/userfiles/files/xezotekotowujamaxizusuxe.pdfIn PDF document text
- http://suliaox.com/v15/Upload/file/2021928057394431.pdfIn PDF document text
- http://athaj2.specialty-match.com/upload/files/bejelabuxemoxaje.pdfIn PDF document text
- http://archi-m.ru/userfiles/file/jemabirop.pdfIn PDF document text
- http://daotaoyduoc.org/wp-content/plugins/super-forms/uploads/php/files/329ca1468b464ab30c32e178bfbe4ba7/pufanemunonagexowixevubod.pdfIn PDF document text
- https://tradegateindia.com/userfiles/file/tuxarufikanavimugesokutes.pdfIn PDF document text
- http://csc-0898.com/userfiles/file/20210929074801_1dluko.pdfIn PDF document text
- http://visusmarble.com/images_upload/files/57834776739.pdfIn PDF document text
- http://zzquansu.cn/d/files/14227734349.pdfIn PDF document text
- http://yonseri.org/userfiles/files/datimokofulelisagebu.pdfIn PDF document text
- https://istanbulbalbir.com/upload/ckfinder/files/89957937391.pdfIn PDF document text
- http://retailpark.bg/uploads/wysiwyg/files/9119486616.pdfIn PDF document text
- http://cartopack.com/Images/file/40238953005.pdfIn PDF document text
- https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1613ce1ab98038---sivepikukutogarenotax.pdfIn PDF document text
- http://adbuilder.at/ckfinder/userfiles/files/74157312257.pdfIn PDF document text
- https://cet.sk/res/file/58103858078.pdfIn PDF document text
- http://www.pethouse.es/ckfinder/userfiles/files/59225948711.pdfIn PDF document text
- https://transturist.transturist.com/ckeditor/ckfinder/files/files/82055676909.pdfIn PDF document text
- https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/dc251bb74d8b232c31788fe6abf90762/gafozed.pdfIn PDF document text
- http://reichspfarrer.sk/file/10351062610.pdfIn PDF document text
- http://poliinc.com/upload/files/vuxalefolitobewasuno.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_off0000b23b.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xB23B | 16928 bytes |
SHA-256: 6bb0d031a062d09a3b8be01a6d19da59229cb0da2dddfacb94d5f142a24ed472 |
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font_01_sfnt_off0000dc1d.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xDC1D | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_02_sfnt_off0000f434.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF434 | 10656 bytes |
SHA-256: 90ef355791b9e56b55c4bf42a8881db651d44dd26cb12514dc783d1adc98f504 |
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