MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The sample is identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as Pdf.Phishing.Trojan. The PDF contains numerous embedded URLs that point to compromised WordPress sites and other disposable hosting, suggesting it functions as a link farm to lure users to malicious content. The presence of external URIs and link farms indicates an attempt to redirect users to phishing or malware distribution sites.
Machine Learning
- Nyx PDF Classifier malicious score 0.9935
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=picard+meets+spock
- https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/70d847a8f6ddcd0d0a784f9f5277d9ef/44720316145.pdf
- http://lbtech.kr/upfile/files/fewapifegadevemuxo.pdf
- https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/iu9bcqquiltdbe9avv53vc5559/rebegi.pdf
- http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ade19c53f27---rifevob.pdf
- http://ewinghighclassof1963.com/clients/e/e4/e4cb61fc1babc639533983e887b7272d/File/mobupafomuzelinewuxe.pdf
- http://rauvuonsach.com/images/uploads/files/rapijajogepowagawijejiji.pdf
- https://luminex.pl/upload/file/13656843628.pdf
- https://amatnieks.lv/pictures/image/37232256650.pdf
- https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/160d34dac563e8---23358821608.pdf
- http://lamekatus.ee/uploads/ckeditor/files/50911320337.pdf
- http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/1609dd6afc46d9---jepurefiwesamevipibu.pdf
- https://mkontakt.pl/dat//file/19098572466.pdf
- http://jshanwoo.com/ckfinder/userfiles/files/20100876909.pdf
- http://cloverpark1961.com/clients/6/6a/6a73a08bb68f643008adb5efbbb44e43/File/77213591010.pdf
- http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1608a059d4b686---6397831323.pdf
- http://alituncer.com/userfiles/file/lovafagewipijixaba.pdf
- http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609ef3f9a36a7---34515206908.pdf
- http://inwallendorf.de/userfiles/file/xaxobupawalas.pdf
- https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/33d3506da09a751188fec2d680a607b0/83862644703.pdf
- https://edinburghpools.com/contents//files/80059377247.pdf
- https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/ob87n35pq5ckuem9t63a81sal1/bobesivasiwawagozeretanom.pdf
- https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3a33d64e0b---44881774632.pdf
- http://dentherapia.hu/files/file/dowuxojitamujulam.pdf
- http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfa4358c76e---dubugonadoji.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_off0000fab6.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xFAB6 | 16792 bytes |
font_01_sfnt_off000112cd.binccb5f46224d20865bc7c2ead85cb0c2451ab9382fb23c077086adcc1151121ea |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x112CD | 10616 bytes |
font_02_sfnt_off00012b27.bin686ff2d311a7b9dcdb9e9acc06fd04ac57f5d72757c374813fbd60f097025d1d |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x12B27 | 17772 bytes |
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