MALICIOUS
164
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The PDF contains embedded JavaScript, which is a common technique for executing malicious code. The sample also exhibits characteristics of a link farm, with numerous external URIs pointing to potentially compromised or disposable hosting sites. These factors, combined with ClamAV detection and ML classification, strongly indicate a malicious intent, likely to redirect users to phishing pages or download further malware.
Machine Learning
- Nyx PDF Classifier malicious score 0.9994
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 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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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 http://sendedianqi.com/upload_fck/file/2021-9-3/20210903151022379820.pdf In PDF document text
- http://kqcme.yiaiwang.com.cn/upload/files/25402633655.pdfIn PDF document text
- https://sitarasign.ir/data/file/3429403079.pdfIn PDF document text
- http://lnimeina.it/userfiles/files/53034043855.pdfIn PDF document text
- https://htijsr.com/userfiles/file/riloxodofosajexarapire.pdfIn PDF document text
- https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/161323ae480387---koremalew.pdfIn PDF document text
- http://pactolous.hu/upload/file/reneragidodinotukodidazi.pdfIn PDF document text
- http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161325f52bb145---49542899394.pdfIn PDF document text
- http://lovepetclinics.com/file_media/file_image/file/xonukunutabiroged.pdfIn PDF document text
- https://chachachat.info/js/ckfinder/userfiles/files/pezojawurexavixem.pdfIn PDF document text
- http://pmke.cz/pictures/files/basuxabipofajex.pdfIn PDF document text
- http://aire-limpio.com/img/editor/file/14747817941.pdfIn PDF document text
- https://christianklein.eu/Quansis/ckfinder/userfiles/files/texuzuzir.pdfIn PDF document text
- http://xinshifm.com/userfiles/file/55501030942.pdfIn PDF document text
- http://christopherdallo.com/file/88242736172.pdfIn PDF document text
- http://torby.kbo.pl/ckfinder/userfiles/files/58001261097.pdfIn PDF document text
- https://elitstroycraft.ru/source/file/7809640947.pdfIn PDF document text
- http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613c4ef46f3ea---50002347479.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=how+to+free+up+memory+on+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_off0000c673.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xC673 | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_01_sfnt_off0000de85.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xDE85 | 17500 bytes |
SHA-256: 09473bbd62ddb51b6d870733c5f418e4d46a7d90067b69a973f0e3975d82452b |
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font_02_sfnt_off00010bdf.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x10BDF | 10736 bytes |
SHA-256: 2d2afbf68f363de0004a7254e0c99080c2d7ab83b98c21f7e43df3edc1bee6d5 |
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