MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The document body is heavily obfuscated and unreadable, but the presence of external URI heuristics and link farm indicators strongly suggests a phishing or malware distribution attempt.
Machine Learning
- Nyx PDF Classifier malicious score 0.9968
Heuristics 6
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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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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://ketchas.ru/uplcv?utm_term=bluelight+filter+ios PDF link annotation
- http://canshu.dlzj.net/upload/files/20210917081541261932.pdfIn PDF document text
- https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/dc9279bfabb3035a65cf7d639e8ef1f3/34221031283.pdfIn PDF document text
- https://pcparts.fr/ckfinder/userfiles/files/noraribojoganigawudigorad.pdfIn PDF document text
- http://urdu-hadith.com/survey/userfiles/files/jilokozorovamido.pdfIn PDF document text
- http://rotarytattoomachine.co/project-new/christianbook/upload_images/file/novox.pdfIn PDF document text
- https://edouardweil.com/userfiles/file/naderebifisopodu.pdfIn PDF document text
- https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/afeae69b93dcebc73de3e9933377b615/41477405817.pdfIn PDF document text
- http://getvisa.ru/images/File/bovufazoleg.pdfIn PDF document text
- http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16147bbb66706d---50593402873.pdfIn PDF document text
- https://jsptti.com/ckeditor/ckfinder/userfiles/files/zulugaxin.pdfIn PDF document text
- https://hantverksakuten.se/ckfinder/userfiles/files/33128684793.pdfIn PDF document text
- http://phongkhamthienhoa.vn/images/files/liwibilugasoze.pdfIn PDF document text
- http://bachova-terapia.sk/images/file/76431750021.pdfIn PDF document text
- http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/161529e703be29---wapiralakiporanekakawome.pdfIn PDF document text
- https://mkycc4.com/kycc4.com/userfiles/files/49828125031.pdfIn PDF document text
- http://www.og2c.com/images/file/89139621173.pdfIn PDF document text
- https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145e5e099ade---piwemenuwuvupeji.pdfIn PDF document text
- http://tythb.cn/uploadfile/files/metegivuberalepewim.pdfIn PDF document text
- https://thietbigas.net/media/files/15847636555.pdfIn PDF document text
- https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/d94d5b6ed2b6a88c7f1bc232e69f07d1/vepekojozonixoseva.pdfIn PDF document text
- https://agmatbaa.com/upload/files/felukax.pdfIn PDF document text
- http://luckysim.com/userfiles/file/98752297854.pdfIn PDF document text
- https://i-intelli.com/ckfinder/userfiles/files/21381982731.pdfIn PDF document text
- http://zhouzhuank.com/v15/Upload/file/202194235239955.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_off0000b00b.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xB00B | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_01_sfnt_off0000c81d.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xC81D | 14640 bytes |
SHA-256: 3660c4f33440e0316b8806845c58033438a0f3c6c4fdf768ba0fe2d961fe9ab5 |
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font_02_sfnt_off0000ed06.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xED06 | 10380 bytes |
SHA-256: 1ffa7540533d5fe0700bdd8ada924af56ae0ccb22a275190464db01ceadffa13 |
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