MALICIOUS
264
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1204.002 Malicious Link
The PDF contains a large number of embedded links pointing to external PDF files hosted on various domains, many of which appear to be disposable. One critical heuristic identified a link to known malicious redirector infrastructure. The ML classifier also strongly flagged this PDF as malicious. The document body is heavily obfuscated and appears to contain metadata rather than user-facing content, suggesting its primary purpose is not informational but rather to facilitate the distribution of other malicious or SEO-manipulating content.
Machine Learning
- Nyx PDF Classifier malicious score 0.9998
Heuristics 7
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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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Callback phishing phone lure medium SE_CALLBACK_LUREDocument asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
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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://crophysi.ru/strik?utm_term=the+red+tent+book+summary In PDF document text
- https://static.s123-cdn-static.com/uploads/4374536/normal_5ffc0835da10a.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4373788/normal_5fc7a59c19e4c.pdfIn PDF document text
- https://japipimimobuxi.weebly.com/uploads/1/3/1/0/131071183/5bba0506c46.pdfIn PDF document text
- https://sudewivozuv.weebly.com/uploads/1/3/2/3/132303071/7a5dae.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4479917/normal_5fd2e0f222191.pdfIn PDF document text
- https://furimubabo.weebly.com/uploads/1/3/1/8/131856330/gewesomot_lepevadiluzapiv.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4380695/normal_600a4956e1c43.pdfIn PDF document text
- https://fovejurifeke.weebly.com/uploads/1/3/4/3/134342496/3763351.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4373504/normal_5fee52835ca4f.pdfIn PDF document text
- https://zimovezinidukiv.weebly.com/uploads/1/3/1/4/131453924/mavipuvi.pdfIn PDF document text
- http://kutakelipaxeb.22web.org/crib_sheets_size.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4392861/normal_6012982bc8e41.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4375704/normal_602dc9ad0214f.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4387704/normal_5ff7b2419f5ed.pdfIn PDF document text
- https://luxituwane.weebly.com/uploads/1/3/1/8/131859527/sexowumaxow.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4485005/normal_603479846017a.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4474977/normal_60402c2d102c2.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4425921/normal_5feb2218e5d83.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e89d.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE89D | 5288 bytes |
SHA-256: d5f900a54beb2a93be0889e7b39e56191f0dfb1944ad45b2e1e08eb8e8e1b111 |
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font_01_sfnt_off0000fa6f.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xFA6F | 10544 bytes |
SHA-256: da49ab719c88d681874bc6aa116ce6759cfb35ac15830d210f894b09166fd949 |
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