MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites and disposable domains, suggesting a phishing or malware distribution scheme. The presence of multiple external URIs and link farm characteristics strongly supports its use in a spearphishing attack.
Machine Learning
- Nyx PDF Classifier malicious score 0.9956
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://nomylo.ru/uplcv?utm_term=agreement+of+the+verb+with+the+subject+rules
- https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/uu9fa960peinf9to98112gjmh0/kitawulolegezaxokib.pdf
- https://bilbox.es/wp-content/plugins/super-forms/uploads/php/files/d182f852285ea4d6b5651cc4cb553cb1/67264676802.pdf
- http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608eb584de216---povuvowutiwani.pdf
- http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160b063e28b6e9---32750951298.pdf
- https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/vrpeidtvuil0t4h60dhl9ktsp2/51403190877.pdf
- http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608101b219971---notub.pdf
- https://akproauto.com/nbloom/fckuploads/file/pivebisavijerefe.pdf
- http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160cf8ab3ecb76---nodaritebi.pdf
- https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ed80d73b72---15056817608.pdf
- http://sbnjl.com/userfiles/files/29089290241.pdf
- http://fontanarosaserigrafia.it/userfiles/file/pojipo.pdf
- http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c106732d45d---10660704852.pdf
- https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/172b766a2cd6f223b8000b2aeeb254a0/malosunazezanoko.pdf
- https://www.movingwithmagna.com/wp-content/plugins/super-forms/uploads/php/files/1c52da7fbf5ddd48d9e19da213c3f33f/20552400962.pdf
- http://minhvuongthuphap.com/upload/ck/files/tepejulawiferope.pdf
- https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/71e11d203205240738397e14d3fd804c/xugixi.pdf
- https://thinkhigh-tech.com/d/files/fapufet.pdf
- http://chongros.com/userData/board/file/31936731001.pdf
- https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/j3i5834kokk6rcrf52f9p30et9/84881500375.pdf
- https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094f4ed0abbf---rowuredego.pdf
- https://slezanie.eu/userfiles/file/2052464182.pdf
- http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f80a15b6ff---28126670910.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 3
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0000ffe7.bin828bd2f3263f185253ac2a5421d26ecba7946a7ba6bac2e7374ea551c45a7964 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xFFE7 | 17036 bytes |
font_01_sfnt_off00012c37.bin3948681f8223e7c74923fc930b0805769f738e5805bbaa594890d629ff95e5d3 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x12C37 | 11124 bytes |
font_02_sfnt_off00014608.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x14608 | 16792 bytes |
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