MALICIOUS
254
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.007 JavaScript
The PDF contains numerous embedded links designed to create a link farm, with a critical heuristic firing indicating it links to known malicious redirector infrastructure. The primary lure appears to be a free download for an 'Ap psychology textbook high school', directing users to the malicious URL https://dafemum.ru/strik. The ML classifier and ClamAV detection strongly support the malicious nature of this PDF.
Machine Learning
- Nyx PDF Classifier malicious score 0.9992
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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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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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/strik?utm_term=ap+psychology+textbook+high+school In PDF document text
- https://cdn-cms.f-static.net/uploads/4427793/normal_604e59d04f65f.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4481819/normal_6024f73584bae.pdfIn PDF document text
- http://geekcods.com/vizio_model_e601i-a3enedyi.pdfIn PDF document text
- http://lnstagram-badge-verification.com/attendance_format_with_in_and_out_time2pbed.pdfIn PDF document text
- http://getsol.xyz/13862988676ovawn.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4455376/normal_6021d30af0d59.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4450732/normal_602ecbe37d9d8.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4410191/normal_602d649dee368.pdfIn PDF document text
- http://deutschebank-meine.com/sharepoint_2013_website_design_tutorialxt41u.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/daniwodug/kenmore_elite_smartwash_quiet_pak_9_dimensions.pdfIn PDF document text
- https://71a0d42b-91d5-4e94-9338-ff69ca8a624b.filesusr.com/ugd/e5d5e5_a201ef407739450a976f364eee96a1c8.pdf?index=trueIn PDF document text
- https://cbf60184-924b-4e65-abc2-244eb733ec12.filesusr.com/ugd/9a25f9_78c3d4f78fd44c9c815141668c6d314e.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/vuxalirudidel/lajikagizaped.pdfIn PDF document text
- https://1794ee33-230d-455b-98b1-84d48067edce.filesusr.com/ugd/551769_72604b2133ee4a2e9f0e9292b2d62438.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/numegubowalonan/apc_back_ups_650.pdfIn PDF document text
- https://0ca3454e-05ac-49fc-8d00-644b1af7be3c.filesusr.com/ugd/8bf3fc_866f78ecacb6456ba108e55280447dce.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/megodipewukitoj/81258414653.pdfIn PDF document text
- http://xoxadexol.rf.gd/goranuvimopoxokituwaz.pdfIn PDF document text
- https://s3.amazonaws.com/gofiguj/86532347098.pdfIn PDF document text
- https://a50dbba5-e4fd-40cc-afa9-a45495a5accf.filesusr.com/ugd/7f929b_b4ec13631653456a88a963e5707d5235.pdf?index=trueIn PDF document text
- http://vemusimovoxodan.rf.gd/50917147323.pdfIn PDF document text
- https://s3.amazonaws.com/regovadeje/banner_vector_photoshop.pdfIn PDF document text
- http://loxosonupod.rf.gd/8305175573.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_off0000f1a4.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF1A4 | 5252 bytes |
SHA-256: 02710ed4f8ca8e3d2ccc4903bb30e0f441bfb4ba821107ba74801eb04f1a2d27 |
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font_01_sfnt_off00010396.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x10396 | 10280 bytes |
SHA-256: 56fa28d1f3ab381a132f298f9ba21ab0ebf82989bca5b48272552640c56435a7 |
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