MALICIOUS
166
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.007 JavaScript
The sample is a PDF file flagged by ClamAV as Pdf.Phishing.Trojan. It contains numerous links to external PDFs hosted on various domains, many of which appear to be disposable. One high-severity heuristic specifically identifies a PDF link to an algorithmically-generated URL, suggesting a phishing or malware distribution attempt. The ML classifier also strongly indicates maliciousness.
Machine Learning
- Nyx PDF Classifier malicious score 0.9840
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 https://vieclamlaocai.vn/webroot/img/files/vuvalanodaruzakopamixujev.pdf In PDF document text
- http://hillsdalehorseboarding.com/ckfinder/userfiles/files/fipikevexego.pdfIn PDF document text
- http://bienbao.org/uploads/files/17219668535.pdfIn PDF document text
- https://u15.ch/ckfinder/userfiles/files/gozupifede.pdfIn PDF document text
- http://originalbau.hu/imagesfiles/kuzakewanipoz.pdfIn PDF document text
- http://ark-mr.com/data/home/qxu2063190031/htdocs/uploadfile/files/punude.pdfIn PDF document text
- http://ewtch.com/upload/files/mufiwutaroxa.pdfIn PDF document text
- https://koltoztetes-szallitas-lomtalanitas.excore.hu/ckfinder/userfiles/files/divavozefoludoxusasavepew.pdfIn PDF document text
- https://flomogroup.com/upload/files/jajezofefo.pdfIn PDF document text
- http://sanxuatbanthinghiem.org/app/webroot/uploads/files/72067541273.pdfIn PDF document text
- http://alexlunacoach.com/img/editor/file/31657567457.pdfIn PDF document text
- https://samngaimarble.com/html_upload/file/748635664.pdfIn PDF document text
- https://cissud.it/uploads/ck_editor/files/53201536381.pdfIn PDF document text
- https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/3ee063b8afe526ce5be68524c2f316a4/36561069087.pdfIn PDF document text
- https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/16136140424542---tarowoxudoruji.pdfIn PDF document text
- http://studiomedicoveterinariobellucci.eu/userfiles/files/wopiwefakogajimuw.pdfIn PDF document text
- http://market-oborudovanie.ru/upload/file/30441596237.pdfIn PDF document text
- http://utcsp2.rustyramone.com/uploads/files/45473439863.pdfIn PDF document text
- https://unovosti.tv/ckfinder/userfiles/files/94292180720.pdfIn PDF document text
- http://hkwwta.org/userfiles/74001722826.pdfIn PDF document text
- http://gidaero.com/upload/fckeditor/file/31662414665.pdfIn PDF document text
- http://bibrka-school.org.ua/ckfinder/userfiles/files/43171841779.pdfIn PDF document text
- http://ambulatorioveterinarioscapindandrea.it/userfiles/files/fapadudemeraroninomani.pdfIn PDF document text
- http://rcot.by/pics/files/kujoxire.pdfIn PDF document text
- http://marinaxaraes.com.br/ckfinder/userfiles/files/todafaperomukexotovumolew.pdfIn PDF document text
- http://elitakhealing.com/ckfinder/userfiles/files/dasodumezeleted.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=compress+picture+size+androidPDF link annotation
- 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_off0000ba0d.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xBA0D | 10820 bytes |
SHA-256: 683c90a42323cd7599d826920e61a5ec0cd2e61dde86d952c9bb0536f6f8a1a4 |
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font_01_sfnt_off0000d310.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xD310 | 16068 bytes |
SHA-256: 5b3eacf18ed58543adff3e0ee240fbbd527ff031392cf16fae2057a8a5b36110 |
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font_02_sfnt_off0000fc50.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xFC50 | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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