MALICIOUS
96
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The PDF file contains a large number of external URIs and link farm patterns, indicating a likely attempt to manipulate search engine rankings or redirect users to malicious sites. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious link farm. No scripts were extracted, and the document body was unreadable, so the specific payload or ultimate goal remains unknown.
Machine Learning
- Nyx PDF Classifier malicious score 0.9966
Heuristics 5
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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=shadowing+let%27s+speak+japanese+intermediate+to+advanced+edition+pdf PDF link annotation
- http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a773c51ed62---67345595913.pdfIn PDF document text
- http://stepsforstarlight.org/clients/c/c6/c668404594a1c08d975ab50c7bec58f6/File/tovamobegapejulanafijene.pdfIn PDF document text
- https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/91420c3da6237e17d1c211ed4ba46c43/warufuvufepaguxojipe.pdfIn PDF document text
- https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/ut6fr2mk0nf78qfcjksi1n8941/14527112897.pdfIn PDF document text
- https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/1609477df63740---fuzapujogedobal.pdfIn PDF document text
- http://sochistandart.com/ckfinder/userfiles/files/34268466514.pdfIn PDF document text
- https://garyjetcenter.com/wp-content/plugins/super-forms/uploads/php/files/347ed12a8b09ba8f3f08735a210c8060/28764102025.pdfIn PDF document text
- http://ccforum.kr/uploads/file/1624508323.pdfIn PDF document text
- http://dientrotiendathc.com/media/ftp/file/dugunaroriwuk.pdfIn PDF document text
- https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/20c4a760b5265299d6d3b49419a51c4f/zarabid.pdfIn PDF document text
- http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078d6a4148d6---runoreja.pdfIn PDF document text
- http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160913ac50838a---38324698292.pdfIn PDF document text
- http://446888.top/userfiles/file/xabazox.pdfIn PDF document text
- http://rhondachem.com/d/files/vonutubonininusejosez.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 4
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0000f1e8.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF1E8 | 17996 bytes |
SHA-256: 360795bdc70466a2376e2f023b829bbfdfb8e1f94a7a0ecb5da5ad45bcd2ceac |
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font_01_sfnt_off000121b2.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x121B2 | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
|||
font_02_sfnt_off000139c9.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x139C9 | 11552 bytes |
SHA-256: 11769b1d58e977b3f1a69a4f3c81f3e1b64229983f57c7835c450adc27095fac |
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font_03_sfnt_off000154d9.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x154D9 | 8184 bytes |
SHA-256: 3145bc4c48a5cc4fdf7ffeafb419dba1fb8110b61b5d4155e89ddf118b3ca54a |
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