MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The PDF contains numerous embedded URLs pointing to various domains, many of which appear to be compromised or disposable hosting. The 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' heuristics indicate a pattern of using these links for malicious purposes, likely phishing or malware distribution. The ML classifier and ClamAV detection strongly support a malicious classification.
Machine Learning
- Nyx PDF Classifier malicious score 0.9835
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 farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARMPDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
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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://krisoc.ru/uplcv?utm_term=mouth+of+the+columbia+river
- http://cgemfoco.com.br/ckfinder/userfiles/files/jejerilupajumob.pdf
- http://www.investinwielkopolska.pl/application/lib/ckfinder/userfiles/files/34801180197.pdf
- https://kohphanganhotelandtour.com/userfiles/file/20571668870.pdf
- http://s2ipower.com/survey/userfiles/files/50795594822.pdf
- http://iranjobex.com/cache/fck_files/file/74496819950.pdf
- http://circuitvietnamcambodge.com/hinhanh/file/bamegaroxugekoj.pdf
- https://srldirect.com/ckfinder/userfiles/files/rejurijowepotumubewo.pdf
- https://bluetact.com/locktactyuma/userfiles/file/33355013037.pdf
- https://educhina.mn/editor/files/tagulegiwunituz.pdf
- http://deleersnijder-bocaege.be/images/file/laluzisisoxukalobulenod.pdf
- https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614b67c879815.pdf
- https://isuzuphonoi.com/data/dulieu/files/xidinaroxatokubanunu.pdf
- https://pass-eco-energies.com/ckfinder/userfiles/files/13915056857.pdf
- http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bfd9414982---lubipofawivexonul.pdf
- http://fuyu.010bi.com/ckfinder/userfiles/files/18146354186.pdf
- http://vhshf.de/File/sisotadimipalepovavu.pdf
- https://aslimitada.com/userfiles/file/puwolu.pdf
- http://intimatehotelpattaya.com/image/upload/File/dezabulobu.pdf
- https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161521821d4c2d---30031631635.pdf
- http://tnshoppingbag.com/upfiles/file/12292763778.pdf
- http://tiszaladany.hu/upload/file/17194734493.pdf
- http://bibliotekaludwin.pl/img/upload/files/56840515340.pdf
- https://netkat.in/ckfinder/userfiles/files/gemoramewafeka.pdf
- http://muasamhangmy.com/ckfinder/userfiles/files/74104763414.pdf
- https://sabagdasarov.ru/upload/file/92772243662.pdf
- http://packturf.fr/files/50993235449.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_off0000eb15.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xEB15 | 16792 bytes |
font_01_sfnt_off00010327.binf0630a604f22d73c066b61ea89efab5f6e1182a560db484cb11201167b857f8e |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x10327 | 19684 bytes |
font_02_sfnt_off00013684.bin94cc479ef8c337fd8e5106959c56cd98992ce046f29445adbf5d0f542db73169 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x13684 | 10628 bytes |
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