MALICIOUS
252
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains, including known malicious redirectors. This behavior is indicative of a link farm, potentially used for SEO manipulation or to distribute malicious content. The ClamAV detection and ML classifier further support its malicious nature, suggesting it may be a phishing or trojan distribution vector.
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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Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTONDocument contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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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/123?utm_term=protein+structure+pogil+ap+biology+answers In PDF document text
- https://static.s123-cdn-static.com/uploads/4451561/normal_5fdf00bb46943.pdfIn PDF document text
- http://mugedly.xyz/48851938679k31xd.pdfIn PDF document text
- https://cdn.sqhk.co/madosodu/sZgebhi/85610176685.pdfIn PDF document text
- https://cdn.sqhk.co/samivegin/jeiinmk/92648423192.pdfIn PDF document text
- http://drilltech.info/290828560628bz4x.pdfIn PDF document text
- https://cdn.sqhk.co/juxefirapuf/Ojhbgco/23488309528.pdfIn PDF document text
- https://minizejemeroro.weebly.com/uploads/1/3/2/7/132740725/2100892.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4417046/normal_600c6fdc3c9f5.pdfIn PDF document text
- https://cdn.sqhk.co/vizakifito/4geigkD/biwuzarumadijizisebe.pdfIn PDF document text
- https://cdn.sqhk.co/semiwewedazi/NHgrgeV/new_offline_games_2019_download.pdfIn PDF document text
- https://cdn.sqhk.co/dajebala/cXmhfhh/53612926436.pdfIn PDF document text
- https://cdn.sqhk.co/nexifatogex/YhhIcj0/dragon_quest_of_the_stars_guide.pdfIn PDF document text
- http://prognoz-football.club/mi_miui_11_update_phone_listbirfm.pdfIn PDF document text
- https://kejobogufepemis.weebly.com/uploads/1/3/0/7/130775396/tapen.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/wewuxuviwar/kansas_agricultural_tax_exemption_form.pdfIn PDF document text
- https://s3.amazonaws.com/kezemiradigu/t_sql_2012_database.pdfIn PDF document text
- https://s3.amazonaws.com/jagux/manual_tester_freelancer_jobs.pdfIn PDF document text
- https://s3.amazonaws.com/sevoga/96208407366.pdfIn PDF document text
- https://s3.amazonaws.com/pujinit/wavim.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_off00010058.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x10058 | 5436 bytes |
SHA-256: 31ab509a6993d8465cb9ed4b650cae1ebe2de0dbb366a38c75ea3500d9c01004 |
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font_01_sfnt_off000112fb.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x112FB | 12444 bytes |
SHA-256: 2000aff8ce1ca16ff5afa5763f9209efc51be8860a48383a47cec221dcbc027f |
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