MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting it's part of a link farm designed to redirect users to malicious content. The presence of multiple external URIs and link farm heuristics strongly supports a phishing or malware delivery vector.
Machine Learning
- Nyx PDF Classifier malicious score 0.9979
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://chcial.ru/uplcv?utm_term=teachers+manual+on+formative+assessment+maths+class+9 PDF link annotation
- https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160965ae196538---85825818725.pdfIn PDF document text
- http://dfh-consulting.com/userfiles/file/37475789605.pdfIn PDF document text
- http://anhuizpyy.com/upload_fck/file/2021-5-7/20210507210226421220.pdfIn PDF document text
- https://foodthings.us/userfiles/file/nojavefew.pdfIn PDF document text
- http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c059382e46a---43563854194.pdfIn PDF document text
- http://broeinest.org/ckfinder/userfiles/files/55453226983.pdfIn PDF document text
- https://piuspvc.it/userfiles/file/80319937730.pdfIn PDF document text
- http://steelbo.com/uploads/admins/u0/files/20210610121152.pdfIn PDF document text
- https://www.psk.com.au/application/third_party/ckfinder/userfiles/files/musirawijemenidupewukixul.pdfIn PDF document text
- http://augustaelectricalwork.com/editorData/file/54524913435.pdfIn PDF document text
- http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/0kl8gs9nic3c2u08ajmcmi8mg1/10316255522.pdfIn PDF document text
- http://duonglaohanoi.com/userfiles/file/katalodese.pdfIn PDF document text
- http://teraval.cz/res/file/50527452738.pdfIn PDF document text
- http://interface-referencement.com/userfiles/file/wudiwabuxixifipo.pdfIn PDF document text
- https://www.burnat-provins.ch/ck/ckfinder/userfiles/files/sadotununivo.pdfIn PDF document text
- https://africanresearchcenter.com/userfiles/file/18094452426.pdfIn PDF document text
- https://evermoral.hk/upload/file/1629208668.pdfIn PDF document text
- http://poorclarescork.ie/images/9174506107.pdfIn PDF document text
- http://skolicka.eu/foto/images/file/97878696321.pdfIn PDF document text
- http://dh-cell.com/ckfinder/userfiles/files/76152959860.pdfIn PDF document text
- http://logopeda-empatia.pl/content/file/42388427543.pdfIn PDF document text
- https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/16111e07ed8f79---tapuvuzirizitagis.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_off0000f79c.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF79C | 18904 bytes |
SHA-256: 3f00a1161f7d07f671caf78bb4191900ce3ab57ae1735056b4362bb93ab2ab5e |
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font_01_sfnt_off000129a8.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x129A8 | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_02_sfnt_off000141bf.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x141BF | 10896 bytes |
SHA-256: 6ef8f8bbd1142069c299559fc31ecda136c945d1284e1fa9ede231cb9b861cee |
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