MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
This PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The document functions as a link farm, containing numerous URLs that point to compromised WordPress sites and other domains, suggesting it is used to redirect users to phishing or malware-hosting pages. The presence of multiple external URIs and link farm heuristics strongly supports this attack pattern.
Machine Learning
- Nyx PDF Classifier malicious score 0.9953
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://crysiq.ru/uplcv?utm_term=factorising+questions+with+answers
- https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/16097e78e4d2e0---86641260001.pdf
- http://vienkiemis.lt/app/webroot/uploads/userfiles/files/pupanedelopajijepagixani.pdf
- http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086fc3edd8ab---87092473138.pdf
- http://thesprotia.gr/uploads/file/61718854387.pdf
- http://kutscher-customs.de/gfx/userfiles/files/gigolaluvazowerodef.pdf
- https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/3427edabc4581d630ae3b390ed2bbf4e/kemipudodi.pdf
- http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609f34e5a05d3---39475931820.pdf
- http://xn----dtbsgbucafmmaf.xn--p1ai/servimages/editor/files/38801632728.pdf
- https://amerismithenterprises.com/wp-content/plugins/super-forms/uploads/php/files/6810abb0193304379dc90d014e903af1/47169782578.pdf
- http://rolmech-strzelno.pl/Upload/file/sixepazeluxatunelana.pdf
- http://usaoxin.com/userfiles/2021-6/file/27341430849.pdf
- http://hotelbelleepoque.bg/userfiles/file/sifejudanefo.pdf
- https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf5ce41331d---26598301234.pdf
- https://asset-books.com/userfiles/file/xugugitedajurusag.pdf
- http://taiwanglassgroup.cn/userfiles/file/38404126838.pdf
- http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160a42ba295280---63480909541.pdf
- http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607f5af95ffc1---44806450394.pdf
- http://barudan.hk/UploadFile/file/20210606071405779.pdf
- https://senhewood.com/d/files/rodaguludisopudimufelab.pdf
- http://peak-experience-japan.com/44695568832.pdf
- http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/1608e5c4819369---jokegufinu.pdf
- http://automsystem.com/UploadFile/file/20210622201313117.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_off00012594.bin6d037a71c3460011df1f74afd0b3258c1506364c553562bf049c95dff6256e9f |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x12594 | 18244 bytes |
font_01_sfnt_off00015598.bin23dfbe9124d27ef9b4c1755226eb570474dc70c8f5f15ec3cba688f3eab48547 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x15598 | 10772 bytes |
font_02_sfnt_off00016e25.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x16E25 | 16792 bytes |
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