MALICIOUS
196
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The PDF file contains numerous embedded links, many pointing to compromised WordPress upload directories, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of PDF_URI and PDF_RANDOM_URL_LINK heuristics suggests the document is designed to redirect users to potentially harmful external resources.
Machine Learning
- Nyx PDF Classifier malicious score 0.9971
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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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://krisoc.ru/uplcv?utm_term=initialize+two+dimensional+array+c
- https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6cf0e5fb2a---57121320453.pdf
- http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/160828fa8923e4---tuveriwemejuwufuvetagu.pdf
- https://pilotcenter.gr/wp-content/plugins/super-forms/uploads/php/files/1hvfafdljuo9gmoucq2kkihc73/jusilusegi.pdf
- https://firsatpin.com/calisma2/files/uploads/29103209475.pdf
- https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/b6a022aa611fd2265aae22769a2a5974/72632908142.pdf
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6f0939295d---94349962643.pdf
- http://gerd-pollak.de/userfiles/file/lipebigovagefuzugitadewav.pdf
- https://www.kasekimi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f7fe1ee155---kaxemew.pdf
- https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acfcc999427---38952480749.pdf
- http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/160960938d4952---notibixu.pdf
- http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/7210d1c513e9361d03d63bfb14ceb549/wanonidibomabesolowejusup.pdf
- http://peusch.lu/userfiles/files/73350981980.pdf
- http://keramann.ru/uploads/files/nepawikojuv.pdf
- http://arcomproltd.com/userfiles/file/dutizoxedawuruxisenut.pdf
- http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/quda2faj13b95fvp506g0ensr5/43457871771.pdf
- https://www.movingwithmagna.com/wp-content/plugins/super-forms/uploads/php/files/d0c2061c38263d7c2b4eef0ed4de6c8a/jopitedilapuxadesopow.pdf
- https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/13d46816d8bd9327447a2a85ad24f6a8/3198834748.pdf
- https://robotics-institute.com/wp-content/plugins/super-forms/uploads/php/files/l4enr2ssn6b9ak7btjdeegqga0/lifetozalodemidamugit.pdf
- https://italvaping.com/file/22075664954.pdf
- https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/126a11595cb39e635a95ec997e8337fd/susexavab.pdf
- https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1609260246737c---64286558001.pdf
- http://audiencefertilization.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/pubetekasojunadavud.pdf
- http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/1608a05c5d0c28---wuvob.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_off0000b424.bin04710f9c750f48dc7db644d7d9f8d7423bb66b261a5b0a949e51ed12592ca563 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xB424 | 14868 bytes |
font_01_sfnt_off0000da5b.bina341bd209209dbee85f5bf82117c25974def5cf1e6ef2b25bbb06367b5d42c98 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xDA5B | 10744 bytes |
font_02_sfnt_off0000f328.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF328 | 16792 bytes |
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