MALICIOUS
164
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The PDF contains an embedded JavaScript stream and a large number of external URIs, many of which point to compromised WordPress sites hosting further PDF files. This indicates a link farm designed to obscure the ultimate destination, likely a phishing or malware delivery site. The ClamAV detection and ML classifier strongly suggest malicious intent.
Machine Learning
- Nyx PDF Classifier malicious score 0.9952
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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Embedded JS stream low PDF_JSPDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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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 http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160846e137824f---fekowu.pdf
- https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1609c2c9b1252f---kekadibab.pdf
- https://mraos.com/web/userfiles/file/jososopidawitad.pdf
- https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a4a81ea966f---dijugewuvojamu.pdf
- https://mygoaltv.com/ipp/images/uploads/files/37702134475.pdf
- https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/vfqi4v8q812n8ktupc7km8f2b7/mukixijepolo.pdf
- http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16115343babe14---xutapi.pdf
- https://businesslife.com/content/file/xajosozinuneta.pdf
- http://baohanhranghm.com/upload/img/files/semel.pdf
- http://cgl.lu/userfiles/files/62567672282.pdf
- https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/160f435d6d3be0---12909318811.pdf
- http://altaprecision.com/userfiles/file/54135780347.pdf
- http://standardamulet.com/files/files/riluforibigujubenodino.pdf
- http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16091c28339a58---26034372678.pdf
- https://washlounge.in/ckfinder/userfiles/files/36187662100.pdf
- http://fandimnarodaku.cz/upload/file/8337459869.pdf
- https://sensormaticltd.com/app/templates/js/ckfinder/userfiles/files/rafakupaxu.pdf
- http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/0ef953e6d8e0a67d22875f55e0437db2/losijerurogoki.pdf
- https://ystechpro.com/nbloom/fckuploads/file/78076598409.pdf
- https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/bec3torcci81oclj6n148utft9/9357216786.pdf
- https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160f7d997dcc9a---95507167262.pdf
- http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160ac142168a83---75351460561.pdf
- https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=how+to+check+sound+frequency
- 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_off0000f650.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF650 | 16792 bytes |
font_01_sfnt_off00010e67.binfccb96688d96b1640ecf34b8d1314e8dc567bdb9fa3f1141add39ac0fbda59cf |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x10E67 | 10804 bytes |
font_02_sfnt_off00012719.bindd98aaf145ea7b42dc7bfb043236f2735a713159caae813f647bbcc2055fb196 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x12719 | 18052 bytes |
font_03_sfnt_off00015673.bin5d9266c5eef8f916b6a6c779d0eb80ed4448f1b8f2c959115243dfc3e5da443a |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x15673 | 16108 bytes |
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