MALICIOUS
166
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The PDF contains multiple heuristic firings indicating it is a link farm designed to host numerous external URIs, with a high-confidence ML classifier and ClamAV detection confirming its malicious nature. The presence of algorithmically generated URLs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic suggest a phishing or malware distribution campaign. No scripts were extracted, but the structure points to the file's primary function being to redirect users to malicious content.
Machine Learning
- Nyx PDF Classifier malicious score 0.9937
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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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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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 http://celeb.huh.hu/UserFiles/File/33286734297.pdf
- https://seo-methodes.com/userfiles/file/nosudojavulumari.pdf
- http://geredekombiservisi.com/userfiles/file/bixovowozimevek.pdf
- http://fqcycpa.com/jingkelun/userfiles/files/20210908020236.pdf
- http://atol-res.pl/uploads/file/15151591845.pdf
- http://studiozoppini.com/userfiles/files/nibuvesemulujuzekosulu.pdf
- https://minhgianggroup.vn/upload/files/dokafadaforozediduge.pdf
- http://www.reeder.ee/files/filemanager/xugebafejogemudep.pdf
- https://francoisdaulte.com/ckfinder/userfiles/files/marodofo.pdf
- http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b8e42d50c3---3284177026.pdf
- http://maszyny.pl/userfiles/file/59258884250.pdf
- https://equantumconsulting.com/files/files/miguminika.pdf
- http://lucidarepavimentimarmogenovaealessandria.it/userfiles/files/36246975637.pdf
- https://asharfilalkulfi.com/ckfinder/userfiles/files/67457104816.pdf
- http://businessdevelopmentcenter.pl/uploads/userfiles/files/4443860199.pdf
- http://sangtaoad.com/uploads/userfiles/file/difugugepis.pdf
- http://federicozucchettiarchitetto.eu/userfiles/files/75567729375.pdf
- http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138c7b04115c---61206911092.pdf
- http://natur-pet.cz/webpagebuilder/ckfinder/userfiles/files/xeguwew.pdf
- https://gizaviation.com/uploads/files/ziripurewubogararojekomar.pdf
- http://iranjobex.com/cache/fck_files/file/bidimujatiwuxadakapawuw.pdf
- https://www.abrasco.org.br/ckfinder/userfiles/files/zexugogiwulelamowinawaw.pdf
- http://bebsulmare.com/userfiles/files/48557857097.pdf
- https://tumujerrusa.com/userfiles/mojerixoxaxugev.pdf
- https://aptitudeclass.com/ckfinder/userfiles/files/13743986066.pdf
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=c2+vocabulary+list+ielts+pdf
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/xap/1.0/rights/
- http://dejavu.sourceforge.net
- http://dejavu.sourceforge.net/wiki/index.php/License
Extracted artifacts 3
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0000fc90.bin431d7cdca0ee3038317aeb6972623606e7b82d48185f75fddc7436f930216951 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xFC90 | 11080 bytes |
font_01_sfnt_off00011674.bin56cd90c811210fd06145dc5edbb8b9a23e129ba46771b227969e6bc895b4acc0 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x11674 | 19108 bytes |
font_02_sfnt_off00014839.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x14839 | 16792 bytes |
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