MALICIOUS
174
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.007 JavaScript
T1203 Exploitation for Client Execution
The sample is a PDF file detected as malicious by ClamAV and an ML classifier. It contains embedded JavaScript and numerous links to external PDF files hosted on disposable domains, indicating a phishing or malware distribution attempt. The presence of embedded JavaScript suggests it may be used to exploit vulnerabilities or redirect the user to malicious sites.
Machine Learning
- Nyx PDF Classifier malicious score 0.9981
Heuristics 7
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ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTIONClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINKPDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
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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 https://synerhu.ru/uplcv?utm_term=custom+rom+mi+a1 PDF link annotation
- http://szakkepzosiklos.hu/upload/file/pipukifiwojugivajejufuso.pdfIn PDF document text
- http://ambulatorioveterinariovianello.eu/userfiles/files/pasedozusejumusukekegoxi.pdfIn PDF document text
- http://www.mattig-accounting.bg/fisiere/file/pewefovogivete.pdfIn PDF document text
- http://dydlhx.com/upfiles/file///fedejifivaneru.pdfIn PDF document text
- http://gruppocreta.com/userfiles/files/gigadenivelovo.pdfIn PDF document text
- https://tresonance.org/uploadfiles/57306014642.pdfIn PDF document text
- https://bursakaynak.net/userfiles/file/jalisopup.pdfIn PDF document text
- http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/16136261c599a4---28342232970.pdfIn PDF document text
- http://classiccar-jp.com/js/upload/files/pakedikozujo.pdfIn PDF document text
- http://luckdidea.com/ckfinder/images_store/files/pedufumewozulofubafuv.pdfIn PDF document text
- http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c705b9a7b7---jinipavabed.pdfIn PDF document text
- http://qianxi.cn/filespath/files/20210910235639.pdfIn PDF document text
- http://siamsnail.com/media/userfiles/files/vemesuvogusazupeze.pdfIn PDF document text
- https://auto826.vnpec.xyz/uploads/files/buduvetajarulovuruboga.pdfIn PDF document text
- http://yongqingtech.com/d/files/vikisapomixijas.pdfIn PDF document text
- http://riviera.az/userfiles/file/sagulibebewi.pdfIn PDF document text
- http://melodylavernebettencourt.com/media/file/bemuvakizuxoz.pdfIn PDF document text
- http://saconsultancy.com/userfiles/file/11841557829.pdfIn PDF document text
- https://eminenceconstruction.ca/viking1/uploads/files/bubutotipizadabo.pdfIn PDF document text
- http://harrodsrentacar.com/public_html/userfiles/file/bujuvolewiborunitisepow.pdfIn PDF document text
- http://rama-sp.com/rama/webroot/js/ckfinder/userfiles/files/96979846681.pdfIn PDF document text
- http://hanhthien.net/uploads/file/54731582263.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_off0000bc1f.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xBC1F | 17012 bytes |
SHA-256: a34e14836314bef4f4356cd54b94a33b911f5ba86d53a2e063cc55422ff9a70a |
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font_01_sfnt_off0000e7db.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE7DB | 10172 bytes |
SHA-256: 2acb33805c5f8c120efcef33480724b83a59bfc077bd6d37921b9111249fa362 |
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font_02_sfnt_off0000feb9.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xFEB9 | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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