MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1204.002 Malicious Link
This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs that point to compromised websites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The document body is heavily obfuscated and appears to be generated by wkhtmltopdf, lacking any discernible user-facing content, further supporting a malicious intent to obscure its true purpose.
Machine Learning
- Nyx PDF Classifier malicious score 0.9980
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://infrive.ru/uplcv?utm_term=what+is+the+square+root+of+578 PDF link annotation
- https://motelandratecuci.ro/userfiles/file/62698760146.pdfIn PDF document text
- http://restravel.ru/ckfinder/userfiles/files/79342804365.pdfIn PDF document text
- https://defrokatilai.lt/images/files/toxukev.pdfIn PDF document text
- http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161482ea20293e---bidudekelifanig.pdfIn PDF document text
- https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/71c43a13fe2b0a1c349898271080f1c2/62452882902.pdfIn PDF document text
- http://laser-piskovani.cz/democms/userfiles/file/xijidawevubefabarus.pdfIn PDF document text
- http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/16155a454aa617---lovaxetodumularopobep.pdfIn PDF document text
- https://dulsuc.cl/userfiles/file/topiwavixi.pdfIn PDF document text
- http://goldsunjsc.com/upload/files/jefiragim.pdfIn PDF document text
- http://stoka-saarlouis.de/userfiles/file/dafadutawufuxe.pdfIn PDF document text
- http://benthanhsgfarm.com/images/uploads/files/vifaxeg.pdfIn PDF document text
- https://isigakizima.net/img/tmp/file/lowukegonalanaxe.pdfIn PDF document text
- http://tonioloclaudio.it/userfiles/files/milapuguso.pdfIn PDF document text
- https://ptogel2.com/contents/files/27749777557.pdfIn PDF document text
- http://originalavto.ru/userfiles/file/petizabuwubiw.pdfIn PDF document text
- http://travellightnepal.com/userfiles/file/5793860779.pdfIn PDF document text
- http://paradisetnl.com/FileData/ckfinder/files/20210929_181425A79A039DD9.pdfIn PDF document text
- http://geopraxis.it/userfiles/files/3483002366.pdfIn PDF document text
- https://ksmt.edu.np/assets/ckfinder/userfiles/files/pugogiram.pdfIn PDF document text
- https://hsse.hssanesteban.cl/files/33438167424.pdfIn PDF document text
- http://zonazero.es/userfiles/file/wuvemol.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_off000122cf.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x122CF | 21000 bytes |
SHA-256: 162820e464996bf8b83ddafd572335bd754da3b357cee58fa66b4816a852c9ce |
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font_01_sfnt_off00015817.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x15817 | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_02_sfnt_off0001702e.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x1702E | 10792 bytes |
SHA-256: ce4ee9a4982ac3b23320450317e54d3821df1b412c707bb80f74a04b29dad1e7 |
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