MALICIOUS
196
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The PDF contains multiple links pointing to compromised WordPress sites, acting as a link farm to host malicious files. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to deliver a secondary payload. The presence of embedded URLs and the nature of the link farms suggest an attempt to disguise the distribution of malware, potentially through spearphishing.
Machine Learning
- Nyx PDF Classifier malicious score 0.9971
Heuristics 7
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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 to algorithmically-generated URL high PDF_RANDOM_URL_LINKPDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
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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 http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16077ccb317527---34602751353.pdf
- http://sntaviator.ru/ckfinder/userfiles/files/28737018352.pdf
- https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16114676ee34c2---siteraxuzugokokasasimad.pdf
- http://sjar-tech.com/uploadfile/file///2021070201174184.pdf
- http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160d4170512d26---zufejodex.pdf
- http://www.findvoters.com/userfiles/file/14676323089.pdf
- https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073b74af3393---38676817069.pdf
- https://tylbm.com/Upload/ckeditor/files/xaluz.pdf
- https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080129b354e2---75104071542.pdf
- http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b27fcc86e29---talonolatowakikidax.pdf
- http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abb78851c43---sowemikiduxaka.pdf
- https://ost-fogging.com/upload/files/4357895912.pdf
- http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/160739c08cdaf2---3234163576.pdf
- http://iehyun.com/editorupload/file/52710167621.pdf
- https://netwindowvn.com/uploads/userfiles/file/20507636804.pdf
- https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/dpbf0lujpqrvsop8omjc3tt1k4/45390467586.pdf
- https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607caf1ec4818---xukalep.pdf
- https://www.elshandmadedesign.nl/ckfinder/userfiles/files/58976026124.pdf
- http://jyjwqj.com/uploadfile/file///2021062819114212.pdf
- https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610aff32ef794---11340351736.pdf
- http://fotomil.pl/ckfinder/userfiles/files/ninatisojewalazaxofita.pdf
- http://ambulatorioveterinarioscapindandrea.it/userfiles/files/40073298648.pdf
- https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bda54f7fde4---delositotapojepunug.pdf
- https://media-get.ru/userfiles/files/zagoregisowipujepemisesem.pdf
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=heaviest+weighted+pull+up
- 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_off00011b08.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x11B08 | 16792 bytes |
font_01_sfnt_off0001331f.binbfc7fde1447ca9fe05c8c0b47a837eb9629741fabfc3da5b0b86b1af88c6bdf2 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x1331F | 10592 bytes |
font_02_sfnt_off00014b3c.binc2b344aad45c46f30e1bde5f24cb4fcb27b2395d10fb417e2170333477b224e8 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x14B3C | 19264 bytes |
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