MALICIOUS
196
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.007 JavaScript
T1203 Exploitation for Client Execution
This PDF document is classified as malicious, exhibiting characteristics of a phishing lure. It contains numerous external links, many of which point to SEO-optimized PDF files, suggesting an attempt to create a link farm. The primary lure appears to be a fake download for 'Advanced systemcare 13 pro activado', redirecting through URLs like https://nipisod.ru/strik. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to distributing unwanted software or malware.
Machine Learning
- Nyx PDF Classifier malicious score 0.9996
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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Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINKPDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
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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://nipisod.ru/strik?utm_term=advanced+systemcare+13+pro+activado PDF link annotation
- http://bepedegikojafeb.22web.org/zibaxikavuliruwatopun.pdfIn PDF document text
- https://venipasor.weebly.com/uploads/1/3/4/5/134584053/xuredananowisi-fipepar-daxupusejekem-rilagaten.pdfIn PDF document text
- https://wotujajatedigi.weebly.com/uploads/1/3/5/2/135295120/6954912.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4475730/normal_60512e4adcb56.pdfIn PDF document text
- https://jozemaxeg.weebly.com/uploads/1/3/0/9/130969614/9508912.pdfIn PDF document text
- http://tiximixisasosa.iblogger.org/kjv_study_bible_app.pdfIn PDF document text
- http://gugaroro.iblogger.org/37857820210.pdfIn PDF document text
- https://loxujuzif.weebly.com/uploads/1/3/4/3/134368844/7277520.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369166/normal_602441d1abaad.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366659/normal_6052d35cc825b.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4380699/normal_60444b3d2a9c9.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://s3.amazonaws.com/dutimajizowa/capsim_forecasting_sheet.pdfIn PDF document text
- https://s3.amazonaws.com/gajabedafot/chicken_invaders_2_full_apk.pdfIn PDF document text
- http://zakivijojinikij.epizy.com/bmo_canada_pension_plan_annual_report.pdfIn PDF document text
- https://s3.amazonaws.com/muvojugejoxip/bassaleg_high_school_uniform.pdfIn PDF document text
- http://jafafikano.epizy.com/research_report_structure.pdfIn PDF document text
- https://s3.amazonaws.com/piwanisaj/nifedipine_procardia_davis.pdfIn PDF document text
- https://s3.amazonaws.com/rixevozajixezos/rheem_hot_water_heater_replacement_element.pdfIn PDF document text
- https://s3.amazonaws.com/jadere/vizatunofazozi.pdfIn PDF document text
- http://tetexamafikej.epizy.com/hi_tech_bluetooth_usb_driver.pdfIn PDF document text
- http://bofutezexo.rf.gd/93611428928.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_off0000f7fc.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF7FC | 5552 bytes |
SHA-256: e5125763e405c780d606f751f08dbf17cf7988fca2ee8e2ab74b5a16f204b680 |
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font_01_sfnt_off00010adf.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x10ADF | 11728 bytes |
SHA-256: e19f326e192a284d010eeed00d8db9567df414608c79f505b19ca0fb33692560 |
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