MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites and are structured as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The primary attack pattern observed is the use of a malicious PDF to lure users to external, potentially compromised, websites.
Machine Learning
- Nyx PDF Classifier malicious score 0.9965
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://rubenoferro.com/userfiles/file/78468576898.pdf
- http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ca041e85c26---82655965852.pdf
- http://sl1971.com/clients/5/51/517263f0417f9379c67e6eba0e0bdfe8/File/vutusumajazom.pdf
- http://www.redactordecontenidos.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16088e400d1977---vitizovemerodu.pdf
- https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/8b38f6f6cb772ef6db1a5b74a0e397db/gazivinokatu.pdf
- https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/160e3baaf7a10d---gerefodizotegiwomul.pdf
- http://qzgj.cn/upload/file/306549703.pdf
- https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bcb2453f55.pdf
- http://longthinhphat.net/uploads/files/juxebokukodoru.pdf
- https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/371c017306f5d23df59090b8c0c51935/59606570424.pdf
- https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/2166431a03047ca0240e2cd18496c4ef/volefokafumo.pdf
- http://zonweringbelgie.eu/ckfinder/userfiles/files/3545633740.pdf
- https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b3c995a4c7---84419186427.pdf
- https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bb81325793f---82068877822.pdf
- https://lexcochoralsoc.org/demo/lccs/beta/userfiles/files/sagibexig.pdf
- http://podiummoda.ru/userfiles/file/99340524830.pdf
- https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/7637585b3f2f8b54c0129aa0a41e6be7/pulopureku.pdf
- https://akproauto.com/nbloom/fckuploads/file/28909115480.pdf
- https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/9e9f9bf279baf138969c2e9e1044a400/nudigotegulu.pdf
- https://delaneyllc.com/ckfinder/userfiles/files/bezobidiluwulebavixite.pdf
- http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/1607cc897a9777---fopasujomaxoxijovo.pdf
- https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bc8864535d5---nuwamegizisiruzedudaxuk.pdf
- http://jp-cable.com/d/files/gakebeliso.pdf
- https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=best+chest+and+tricep+exercises
- 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 3
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0001412d.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x1412D | 16792 bytes |
font_01_sfnt_off0001593f.bine358bea59baf037237e79acac327a5fa85864a8cd924336beeb64b865937b6dc |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x1593F | 17116 bytes |
font_02_sfnt_off000185ed.bin581c8b26e663706bd9606b6598efef62ecba45d9827f339d8d99897b84200211 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x185ED | 10600 bytes |
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