MALICIOUS
164
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The file was detected as malicious by ClamAV and an ML classifier, with heuristics indicating it functions as a link farm pointing to potentially compromised CMS upload storage and disposable hosting. The presence of embedded URLs and the 'Fake invoice / payment lure' heuristic suggest a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF format often utilizes JavaScript for malicious actions, hence T1059.007 is included.
Machine Learning
- Nyx PDF Classifier malicious score 0.9947
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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Fake invoice / payment lure low SE_INVOICE_LUREDocument contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
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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://zhengfutz.com/v15/Upload/file/2021625830126438.pdf
- http://learningkey.org/userfiles/lewaw.pdf
- http://jarosi.hu/files/file/82414571091.pdf
- https://circolodelpistone.ch/userfiles/file/zuzarununebapiv.pdf
- https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/3a20479cfc7b4a6bb16d8ad9e076c079/29160714886.pdf
- http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/jf7irljmha064e0e1osmjrjvke/juwomotixigesukugavarena.pdf
- http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a72dc66cb5b---26561252608.pdf
- https://alianzatours.com/imagenes/file/fogowu.pdf
- http://boothbayharborshipyard.com/userfiles/file/86756876499.pdf
- https://eyetracking.pl/userfiles/file/56648239089.pdf
- http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/1434d75bcb866f90cfb340de30214f1b/90768132297.pdf
- http://s8radziejowice-paszkow.pl/userfiles/file/73760492309.pdf
- https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/b92b12622bb4ac3942376eb3603111eb/boxejojomokefuj.pdf
- https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/160824afce4802---dabuxovofesadekopadelij.pdf
- http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ad0a8939c8---sunodajipapilivaz.pdf
- http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad3bbe185e2---75110662892.pdf
- https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608366b000d05---gopazu.pdf
- http://gazosilikatnn.ru/uploads/files/taxabolegumozudujusufem.pdf
- https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160ace3564f30b---wufumometugetep.pdf
- https://barcelonamedicalcenter.com/files/galeria/files/pibaxomupamuvunutenuparop.pdf
- https://nevisnews.com/userfiles/damufekizenazaw.pdf
- https://motelandratecuci.ro/userfiles/file/76621710277.pdf
- https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/878b3e8ff5946979c9e14deff80965e5/82239000767.pdf
- https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/2c44vujbcn9kvhtvd2qfln0ea3/xagusivuwatugofubukijumux.pdf
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=your+acknowledgement+receipt+of+this+email
- 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_off0000f46f.binfa9b6cef7222e4ae2a2022473f1663a13ba941772a8672fadc6317a07baf8edf |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF46F | 17704 bytes |
font_01_sfnt_off000122b9.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x122B9 | 16792 bytes |
font_02_sfnt_off00013ad0.bindd15413d6557a9ed9fcef1eb50bd32f8aa5511316dd89b9b910f8606bfab3bd6 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x13AD0 | 11328 bytes |
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