MALICIOUS
174
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The PDF contains embedded JavaScript and multiple external links, including one to an algorithmically generated URL, indicating a malicious intent to redirect the user to a payload. The ML classifier and ClamAV detection strongly support this assessment. The primary attack pattern involves leveraging a PDF vulnerability or social engineering to execute a malicious script that likely downloads and executes a second-stage payload.
Machine Learning
- Nyx PDF Classifier malicious score 0.9965
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 link to algorithmically-generated URL high PDF_RANDOM_URL_LINKPDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
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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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Embedded JS stream low PDF_JSPDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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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://crewmak.ru/uplcv?utm_term=amazing+words+that+start+with+o PDF link annotation
- https://www.verimevzabavu.cz/ckfinder/userfiles/files/89669641143.pdfIn PDF document text
- http://quimis.net/js/ckfinder/userfiles/files/tuvugovidivuze.pdfIn PDF document text
- http://ranjitabiswas.com/userfiles/files/waxupi.pdfIn PDF document text
- https://gegeny.hu/uploads/file/wizofekejijevabokarusewu.pdfIn PDF document text
- http://massintech.ru/img/outer/files/23143016273.pdfIn PDF document text
- http://hvezda-pardubice.cz/files/file/wanonefivu.pdfIn PDF document text
- https://vpmemorial.net/images/file/towatojakiwekodekugib.pdfIn PDF document text
- http://dienvietbac.com/uploads/files/ruveximajif.pdfIn PDF document text
- http://grandp.ru/userfiles/file/7878055038.pdfIn PDF document text
- http://www.dialog-seversk.ru/jsplugins/ckfinder/userfiles/files/soxikadixugunapobefedex.pdfIn PDF document text
- http://vonschickenconcord.com/uploads/files/43877253898.pdfIn PDF document text
- http://duythuc-bearing.vn/uploads/userfiles/file/xibapi.pdfIn PDF document text
- http://altelaw.com/uploads/image/file/6701685861.pdfIn PDF document text
- http://phupmirpol.pl/userfiles/file/67113282297.pdfIn PDF document text
- https://horacebatten.com/ckfinder/userfiles/files/13107964500.pdfIn PDF document text
- http://zgic.ru/!upload/files/569293862.pdfIn PDF document text
- http://jaqalsports.com/files/file/sumuzi.pdfIn PDF document text
- http://clinicaveterinariacittadivignola.com/userfiles/files/fuxovobebeditaxutalikef.pdfIn PDF document text
- https://gangwontaxi.com/FileData/ckfinder/files/20210903_7D4903306D479184.pdfIn PDF document text
- http://italy-ex.com/images/blog/file/20373868725.pdfIn PDF document text
- http://xn--j1aai7d.xn--p1ai/userfiles/file/ninofidi.pdfIn PDF document text
- https://pelletier-tp.fr/ckfinder/userfiles/files/13277754367.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://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
Extracted artifacts 3
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0000ad80.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xAD80 | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_01_sfnt_off0000c592.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xC592 | 15868 bytes |
SHA-256: 6d1069065ce6834faef72f76d524e19fba2bd1890e0c94a2147b0e0c608f98c6 |
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font_02_sfnt_off0000ee0b.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xEE0B | 10644 bytes |
SHA-256: f1a28a17649eb98a37548ae75c583b6f59dab753e8ce84f0a082c0cd9489070e |
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