MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The sample is a PDF file identified as malicious by ML classifiers and ClamAV. It contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests this is a tactic for phishing or malware distribution. No scripts were extracted, but the PDF structure and embedded URLs are indicative of a malicious intent to redirect users to potentially harmful content.
Machine Learning
- Nyx PDF Classifier malicious score 0.9959
Heuristics 6
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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 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://smidgel.ru/uplcv?utm_term=nexus+7+2013+dimensions PDF link annotation
- http://hmed.vn/upload/files/ribibonarilewaso.pdfIn PDF document text
- https://gertiesbloomers.com/kousumi/nulook/upload/fckimages/file/23155013786.pdfIn PDF document text
- https://mosconi.net/userfiles/file/manulipudolagujudipuvetuk.pdfIn PDF document text
- https://najlepsze-w-polsce.pl/uploads/73528587071.pdfIn PDF document text
- http://chanassociation.org/uploads/file/24998832105.pdfIn PDF document text
- http://uklearningnetwork.com/userfiles/file/torib.pdfIn PDF document text
- https://esterkins.de/ckfinder/userfiles/files/62734795508.pdfIn PDF document text
- https://justforjetscatering.com/userfiles/image/files/jilonabe.pdfIn PDF document text
- https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136727a33a48---nozes.pdfIn PDF document text
- http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/161496538ac089---25942895089.pdfIn PDF document text
- https://ww170002.linebot.net/upfile/files/20210925071655.pdfIn PDF document text
- http://audidalys.lt/ckfinder/userfiles/files/povip.pdfIn PDF document text
- http://vizugy.hu/uploads/files/golasijememumifozifi.pdfIn PDF document text
- http://proreferee.ru/uploads/ckfinder/files/muwokixojufoku.pdfIn PDF document text
- http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1613a254a5b508---30964077129.pdfIn PDF document text
- http://sithome.com/upfiles/file/20210904165049.pdfIn PDF document text
- http://lawngo.net/fckfiles/mugoxosatenanilibarexoto.pdfIn PDF document text
- http://it-hair.com/userfiles/wozezobemujaf.pdfIn PDF document text
- http://vegman-kzn.com/ckfinder/userfiles/files/foroduvexipupoko.pdfIn PDF document text
- https://burgas-remonti.com/userfiles/file/84796710988.pdfIn PDF document text
- http://svadbavmoskve.com/content/xuploadimages/file/mutilurorazeg.pdfIn PDF document text
- http://axiomestates.com/userfiles/file/97247711186.pdfIn PDF document text
- http://zoldjogsi.hu/uploads/files/bakovesamepugezifugamajed.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_off0000ad6e.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xAD6E | 10696 bytes |
SHA-256: 28759fe46aaaeb09f46ff179e35e08d73f5d72cc8c9ce4987c47b3da7b80ee25 |
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font_01_sfnt_off0000c61a.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xC61A | 15980 bytes |
SHA-256: 07054c4df53ad77be7129e4bab4981b1bba10e1de148a3e4cd1b59d99a8937f6 |
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font_02_sfnt_off0000ef31.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xEF31 | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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