MALICIOUS
96
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The PDF file contains a large number of embedded URLs, many of which point to compromised CMS upload directories. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates that the PDF is structured as a link farm, likely for SEO manipulation or to distribute malicious content. The ML classifier also flagged this PDF as malicious with high confidence.
Machine Learning
- Nyx PDF Classifier malicious score 0.9965
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 http://ahdongjiu.com/upload_fck/file/2021-5-17/20210517131937258508.pdf In PDF document text
- http://tai-group.com/upload/files/13832751588.pdfIn PDF document text
- https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/3aedf2a539050f50f7ee1daeec8d5c26/verokopafetixibuz.pdfIn PDF document text
- https://www.carrentchiengmai.com/files/jejuvapevepi.pdfIn PDF document text
- http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bceda1e446---bowilixenezibi.pdfIn PDF document text
- https://robotics-institute.com/wp-content/plugins/super-forms/uploads/php/files/tcbqaoi8aobptngj1f0b6bfaso/pefagesabimaxemol.pdfIn PDF document text
- https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/b953050432f7027004e4f412ab89dfde/2428033032.pdfIn PDF document text
- https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/16077581d3efdd---gematodalajawed.pdfIn PDF document text
- https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/51a7003e6c0ca4a53b82431058e0c027/85585600467.pdfIn PDF document text
- http://rencontres-icare.org/userfiles/file/23103769924.pdfIn PDF document text
- http://elementsgogreen.com/userfiles/file/tamar.pdfIn PDF document text
- http://timavoshipsupply.it/userfiles/file/7604262249.pdfIn PDF document text
- http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16080b98aa37e1---fevagujabepivuf.pdfIn PDF document text
- https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/aefe79884f2944c0eb487ab20ee00121/82411866084.pdfIn PDF document text
- http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071c4cd1f25c---jevore.pdfIn PDF document text
- http://massageindex.nl/images/uploads/denavonexaxapip.pdfIn PDF document text
- https://elektrona.cz/files/file/54123329679.pdfIn PDF document text
- http://sahrugs.com/userfiles/file/jafavuguborod.pdfIn PDF document text
- http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607bda868e8ad---63566906508.pdfIn PDF document text
- https://bushregenerators.biz/userfiles/files/xaganom.pdfIn PDF document text
- https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/thcevcja752s0rk6257opuvom2/98453906436.pdfIn PDF document text
- http://symbioticlifetech.org/attfile/fckimg/file///2021052695251_746723642.pdfIn PDF document text
- http://phuongninhphat.com/uploads/userfiles/file/93048914684.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=13+yards+to+feetPDF link annotation
- 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_off0001429f.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x1429F | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_01_sfnt_off00015ab1.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x15AB1 | 17172 bytes |
SHA-256: be1b48daf831e3243ad18679b8bde123f225c3cee01ff6288afc38cae1c5e40c |
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font_02_sfnt_off0001878d.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x1878D | 10344 bytes |
SHA-256: ee3820c1f01bfe20eff525852cd699d59d1f419a32c6169384b188b0c51e322c |
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