MALICIOUS
164
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The sample is a PDF file containing embedded JavaScript, which is a common technique for exploiting vulnerabilities or delivering malicious content. Heuristics indicate it functions as a link farm, directing users to compromised websites or disposable hosting, likely for phishing or malware distribution. The ClamAV detection and ML classifier strongly suggest malicious intent.
Machine Learning
- Nyx PDF Classifier malicious score 0.9975
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 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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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://coretry.ru/uplcv?utm_term=dls+2021+hack+version PDF link annotation
- https://yantrasearch.com/ckfinder/userfiles/files/julenanowigagesikazo.pdfIn PDF document text
- https://poldercuptrofee.nl/site/admin/ckfinder/userfilesfiles/4688123294.pdfIn PDF document text
- https://lochoanggia.com/upload/files/65590094011.pdfIn PDF document text
- https://adsbudget.net/userfiles/file/21379817759.pdfIn PDF document text
- http://residenzaeden-albisola.com/userfiles/files/58113526579.pdfIn PDF document text
- http://lecostationery.com/files/file/zisesomevivep.pdfIn PDF document text
- http://avesta-hmora.boj.se/uploads/userfiles/files/mozonepe.pdfIn PDF document text
- http://njbeihang.com/uploadfile/file///2021090623383552.pdfIn PDF document text
- http://rts-3.ru/upload/files/45035803182.pdfIn PDF document text
- http://mpu-beratung-brendle.de/userfiles/file/30446680603.pdfIn PDF document text
- https://taiwan-tiaya.com/upload/tiaya_official/files/gazar.pdfIn PDF document text
- http://mini-garden.ru/userfiles/file/rezerad.pdfIn PDF document text
- https://yantrasearch.com/ckfinder/userfiles/files/gumusunasat.pdfIn PDF document text
- https://hw-power.com/uploads/ckfiles/files/61481954753a9.pdfIn PDF document text
- http://rosabaum.de/web/editor/files/rirodotol.pdfIn PDF document text
- http://reklamaopole.pl/userfiles/file/38256138153.pdfIn PDF document text
- http://mediasingrid.com/js/new/fckeditor/userfiles/file/46757217555.pdfIn PDF document text
- https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/1614153c790471---nadalalirexobizobovuge.pdfIn PDF document text
- https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/m2gltt4rn54dubbvjmbbu595oo/liseravaxiwabof.pdfIn PDF document text
- http://hauptlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/74578213254.pdfIn PDF document text
- https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/1614d76a3105bb---25006248648.pdfIn PDF document text
- http://szermgrt.hu/uploads/ckfinder/userfiles/files/72609043969.pdfIn PDF document text
- https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/d767870480b182a4058e5a2ed5b75d2f/95794776751.pdfIn PDF document text
- http://assotechne.eu/userfiles/files/sutoriz.pdfIn PDF document text
- https://www.akilciilacdernegi.com/ckfinder/userfiles/files/kaxazesogerivetik.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_off0000b429.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xB429 | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_01_sfnt_off0000cc40.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xCC40 | 10684 bytes |
SHA-256: b9c52c82c10a47d6c4d7fd8be9b31eed2f3c105fe9e38d6bd33220fbfbb5a093 |
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font_02_sfnt_off0000e4cb.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE4CB | 14804 bytes |
SHA-256: 0935d0d51081e4227875facb2517e75a28105bb8181102bb5c06b9649a5f00d6 |
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