MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs and links to compromised WordPress upload storage, suggesting it is part of a link farm designed to redirect users to malicious content. The presence of PDF-specific heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this, indicating the document's primary purpose is to host and distribute links to potentially harmful sites.
Machine Learning
- Nyx PDF Classifier malicious score 0.9947
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://krisoc.ru/uplcv?utm_term=urbanismo+bioclimatico+ester+higueras+pdf
- http://cjcounsel.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kaxozutezujagufo.pdf
- https://irisapp.cn/uploadfiles/fckeditor/20210514/file/16209675108495.pdf
- https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/8edeea7b24fc6ee65b535e09fddcaf9e/8718228202.pdf
- https://krajkarka.cz/userfiles/file/38840240229.pdf
- https://www.mii.net/wp-content/plugins/super-forms/uploads/php/files/c787c133853623d3fb2c2b1ac2c1fe15/10304546158.pdf
- http://stellarp.com/userfiles/files/bonozobovot.pdf
- http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/b5ea2641ca103adda3733aa560bcd961/bodibudotepitotovavulu.pdf
- http://ldbell1965.net/clients/85689/File/13377203976.pdf
- http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd66237b4c---wenefaxidu.pdf
- https://charterfori.ir/basefile/charterforiir/files/13490722861.pdf
- https://harteron.ee/userfiles/file/71844306500.pdf
- http://barnesfamilyre-union.com/clients/52050/File/69044095948.pdf
- https://5udua.com/contents//files/29159896569.pdf
- http://bougerpourstarlight.org/clients/c/c6/c668404594a1c08d975ab50c7bec58f6/File/30148033145.pdf
- https://sanipro.ma/app/webroot/uploaderfiles/togamivawigagakudog.pdf
- https://pingthye.com/userfiles/files/vafuvesu.pdf
- https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/oovd5pobf4evoj1v4dbskcg5il/31917876818.pdf
- https://geneticapanama.com/userfiles/file/26332025621.pdf
- https://shayangroup.net/wp-content/plugins/super-forms/uploads/php/files/92e6db22634dcf7a77db551a112b5c15/3643977990.pdf
- http://barefoot.pl/userfiles/file/53847539594.pdf
- http://douzonebnf.com/upload/file///14278736923.pdf
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077c76dc01ee---91962204087.pdf
- https://indiantalentjunction.com/milan/media/2630327639.pdf
- https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607d07514ae87---75980683927.pdf
- http://texinpack.com/uploadfile/file///2021090407141888.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_off0000b329.bin1d4d4d51806ee4a12a501d9600a2a441d7203b7078a8680193d1b39812da4261 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xB329 | 16372 bytes |
font_01_sfnt_off0000dcee.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xDCEE | 16792 bytes |
font_02_sfnt_off0000f505.bin6da47dbc04faa41000b3376dbd169da7e70a21c7e595b6e4a959e0878db055a0 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF505 | 11312 bytes |
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