MALICIOUS
244
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The PDF contains a large number of embedded links pointing to external PDF files, a technique often used for SEO manipulation or to distribute further malicious content. Several heuristics indicate this is a malicious link farm, with one URL specifically identified as a known malicious redirector. The ClamAV detection and ML classifier further support the malicious nature of this file.
Machine Learning
- Nyx PDF Classifier malicious score 0.9997
Heuristics 6
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ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTIONClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINKPDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
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Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARMSmall PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
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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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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://dafemum.ru/award?keyword=tesis+de+calidad+de+vida+en+adolescentes+pdf In PDF document text
- https://cdn-cms.f-static.net/uploads/4422382/normal_60343d1c2cac7.pdfIn PDF document text
- http://beririka.scienceontheweb.net/the_hobbit_concept_art_book.pdfIn PDF document text
- http://dalifajebuxog.scienceontheweb.net/rujeseru.pdfIn PDF document text
- http://jixazepo.mywebcommunity.org/brighton_and_hove_school_holidays.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4490370/normal_6048d6c34b0e7.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4481411/normal_5ffec4ca5dcf0.pdfIn PDF document text
- http://zijaditenup.getenjoyment.net/msm_photodetector.pdfIn PDF document text
- http://lebedugipul.mywebcommunity.org/juxesuzuludezegofixuvoxa.pdfIn PDF document text
- https://s3.amazonaws.com/xujitezu/18203360064.pdfIn PDF document text
- https://s3.amazonaws.com/rurovikejigibu/68140201625.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4479462/normal_603dd4dea5bd1.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4461744/normal_6053836278a66.pdfIn PDF document text
- http://gegebafebofad.scienceontheweb.net/44165671692.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4372377/normal_60303176032f4.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4450419/normal_602126e58000b.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4391649/normal_5ff4b65437330.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4443354/normal_604d67713df00.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://99b08629-27b2-41dd-83a1-938dc2ca35bd.filesusr.com/ugd/067ecb_520a8c1b639c4bfab2698ab00252a6e1.pdf?index=trueIn PDF document text
- https://8d5bcf17-53f2-4f21-b585-7a27aef14131.filesusr.com/ugd/7baf93_f045231e16fc4471abd5794aaaf91711.pdf?index=trueIn PDF document text
- https://8f0c9b82-9570-4081-bbb7-5e23a534ea09.filesusr.com/ugd/7008f3_b7808a77883049e6bc82580fec44c1b3.pdf?index=trueIn PDF document text
- https://315736c7-1030-4200-8d24-05c9f4951019.filesusr.com/ugd/d19ca0_e86e4de3b7b648a19818bf8840beb141.pdf?index=trueIn 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://scripts.sil.org/OFLIn PDF document text
Extracted artifacts 2
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0000c566.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xC566 | 5064 bytes |
SHA-256: 577acbb2d3f57e9ddca8df86a23ebaf24b8e6eac090d95ce410e34aac6673e60 |
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font_01_sfnt_off0000d6bf.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xD6BF | 10528 bytes |
SHA-256: cbf9942696cc9c9f79411cd6a84d13086b87d98ed50386891fb9793195ead957 |
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