MALICIOUS
96
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1598.003 URL/Domain Link
The PDF file contains a large number of external links, a technique often used for SEO spam or to redirect users to malicious sites. The heuristic PDF_SEO_LINK_FARM specifically flags this behavior, indicating a potential link farm. The ML classifier also strongly suggests maliciousness. The document body, though partially corrupted, contains text related to 'Distribuição eletronica em camadas exercicios 9 ano' and mentions 'wkhtmltopdf', suggesting a lure document.
Machine Learning
- Nyx PDF Classifier malicious score 0.9999
Heuristics 4
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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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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://ricepaperstraw.org/uploads/1/3/0/6/130620546/130620546.html#distribui%25C3%25A7%25C3%25A3o+eletronica+em+camadas+exercicios+9+ano PDF link annotation
- http://ademkracht.nu/uploads/1/3/0/6/130639368/xajesos-fekadujok-valaxibep.pdfIn PDF document text
- http://74-123-77-189.mgwnet.com/uploads/1/3/1/3/131383453/2f6bf9d960b3f8.pdfIn PDF document text
- http://immobiliaremyriam.it/uploads/1/3/0/8/130874389/125892.pdfIn PDF document text
- http://customcateringco.com/uploads/1/3/0/4/130435905/vetejazibirilu.pdfIn PDF document text
- http://nprycetest.com/uploads/1/3/1/4/131409508/1656205.pdfIn PDF document text
- http://salemll.info/uploads/1/3/0/7/130738555/2441043.pdfIn PDF document text
- http://hbcommunitymortgage.com/uploads/1/3/0/6/130605048/5943015.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://motajixug.files.wordpress.com/2020/06/jidarubita.pdfIn PDF document text
- https://jijexore.files.wordpress.com/2020/06/61708571627.pdfIn PDF document text
- https://nufaxubo.files.wordpress.com/2020/06/vexuto.pdfIn PDF document text
- https://zonivip.files.wordpress.com/2020/06/57696775056.pdfIn PDF document text
- https://nisedaki.files.wordpress.com/2020/06/godidakozajezuroxifukumer.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://scripts.sil.org/OFLIn PDF document text
Extracted artifacts 1
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off00005ebb.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x5EBB | 12896 bytes |
SHA-256: 5f584ede2c82c469e073d356886833d5cf4fef611123c63d020e3eb65ab34744 |
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