MALICIOUS
186
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.007 JavaScript
The PDF contains a large number of external links, many pointing to disposable hosting services, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded URLs, such as 'https://chcial.ru/pbw?utm_term=worksheet+for+class+8+maths+chapter+square+and+square+roots', are likely used to redirect users to malicious sites or to generate ad revenue.
Machine Learning
- Nyx PDF Classifier malicious score 0.9998
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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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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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://chcial.ru/pbw?utm_term=worksheet+for+class+8+maths+chapter+square+and+square+roots PDF link annotation
- https://cdn-cms.f-static.net/uploads/4427544/normal_606d32de48a85.pdfIn PDF document text
- https://xiravitufe.weebly.com/uploads/1/3/4/4/134438949/pikafujiselelijun.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4404739/normal_60b94724d97fe.pdfIn PDF document text
- https://pefasuvut.weebly.com/uploads/1/3/4/7/134716349/7bbff4900b0d.pdfIn PDF document text
- https://gavixidosoxadi.weebly.com/uploads/1/3/0/7/130776067/2629028.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4489033/normal_5fda1f4f35106.pdfIn PDF document text
- https://gegawega.weebly.com/uploads/1/3/0/7/130739786/fisobajonukizupog.pdfIn PDF document text
- https://nipobajomofak.weebly.com/uploads/1/3/4/6/134641158/zogulo_tuzuvanu_limepusawuruno.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4403119/normal_5fd6718bc2b23.pdfIn PDF document text
- https://vafumavuforowa.weebly.com/uploads/1/3/4/4/134489815/958204df479.pdfIn PDF document text
- https://deperomider.weebly.com/uploads/1/3/4/3/134344929/dosematog.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://wedezim.pbworks.com/f/49083356060.pdfIn PDF document text
- http://murusefikuk.pbworks.com/w/file/fetch/145087920/download_ringtone_crazy_frog_axel_f.pdfIn PDF document text
- http://nukisefel.pbworks.com/f/ingls_gratis_para_principiantes_adultos.pdfIn PDF document text
- http://wezenibafasi.pbworks.com/w/file/fetch/144747921/gosoxa.pdfIn PDF document text
- http://bekivuxuga.pbworks.com/f/kotiganajatebizibora.pdfIn PDF document text
- http://zezimin.pbworks.com/w/file/fetch/144593124/how_to_get_birth_certificate_in_india_for_green_card.pdfIn PDF document text
- http://joxupakager.pbworks.com/w/file/fetch/145282245/gijobozasukazajifu.pdfIn PDF document text
- http://rulemujog.pbworks.com/f/gizonukogofofeno.pdfIn PDF document text
- http://padimagofo.pbworks.com/f/st_landry_parish_sheriff_opelousas_la.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 2
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0000dcb6.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xDCB6 | 5792 bytes |
SHA-256: c1fc86fb3ac67a397517acd42d57ef90c2bcfdc5b48ce0703da7a76620f75e3e |
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font_01_sfnt_off0000f055.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF055 | 10928 bytes |
SHA-256: 7d4c5a98dcbd2d90b6982aa0237a8435d8046273b53392c454464ea18f50e2e8 |
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