MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
This PDF sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised CMS upload directories and disposable hosting. These links likely serve to redirect users to further malicious content or phishing sites, a common tactic for initial compromise via spearphishing attachments.
Machine Learning
- Nyx PDF Classifier malicious score 0.9997
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://allytemp.ru/uplcv?utm_term=density+based+clustering PDF link annotation
- https://popa.com.br/wp-content/plugins/super-forms/uploads/php/files/49d3092fddfeca90086fb7afb0b40c3f/7446028565.pdfIn PDF document text
- https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/2e91e33fb09013b8ae0101b579bd043a/14283463846.pdfIn PDF document text
- https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/imo9i5vs2dt705bf296vafevpu/81580256521.pdfIn PDF document text
- http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609d4f2e1ad6c---xegamuganudasijeg.pdfIn PDF document text
- http://capitolmetrophysicaltherapy.com/userfiles/file/10268165093.pdfIn PDF document text
- https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160b92b441cbe1---52227687030.pdfIn PDF document text
- https://cornerstonelaw.eu/userfiles//file/25796807884.pdfIn PDF document text
- http://4grd.com/cmsimages/file/pujuvuzazimevidaj.pdfIn PDF document text
- http://zdrowejaja.com/Upload/file/5758714656.pdfIn PDF document text
- https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/d94bc122dbb9e43d7a93dbf3cc80a854/80566033937.pdfIn PDF document text
- https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/9c00ae47e4fecb9bfff61c6093b59eea/jozoba.pdfIn PDF document text
- https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/23f553da0fa6b7733efc1b200495b7d1/lijuxixojijawu.pdfIn PDF document text
- http://fantalife.nl/userfiles/file/77777947618.pdfIn PDF document text
- http://bright-mineral.com/uploadfile/file/2021052720561741.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn 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_off00011d14.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x11D14 | 5348 bytes |
SHA-256: c84879207afb1018fb75ae02cbf58d3eb8ba23a86f45485f2e17c552d6d78cd2 |
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font_01_sfnt_off00012f57.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x12F57 | 13348 bytes |
SHA-256: 29e57931a32c8d069ca885f55ffc33245a7b9982686fcd1fd758be0f96553755 |
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font_02_sfnt_off00015b90.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x15B90 | 16112 bytes |
SHA-256: 6bfd663be811f4c0caa16031a69679ba2b5a79eca72185f30448f1bd3e23166d |
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