MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics indicate it functions as a link farm, directing users to compromised WordPress upload storage and other potentially malicious sites. The presence of numerous external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic suggest the primary goal is to redirect users to external resources, likely for phishing or malware delivery.
Machine Learning
- Nyx PDF Classifier malicious score 0.9835
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://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/qit050b8plniipric3iaurdev1/14096748520.pdf
- http://thuephotocopytaihanoi.com/upload/files/18635302880.pdf
- https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/v1m1imjuhbt53tpfjm5urlcm9q/somiwedijalun.pdf
- https://wills.sg/wp-content/plugins/super-forms/uploads/php/files/6035e3e3a4baeb57a73d2f5b28b0afb5/98330696925.pdf
- http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1609c0283a75ec---80956401652.pdf
- https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/fdb17bfaf4bc8dd3886b11981da33bd8/79857575041.pdf
- http://amexeuro.com/an3_Uploads/file/nofobutopowararebure.pdf
- https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609769bc68d10---nuvopefaliremug.pdf
- https://ikitellirezistans.com/upload/files/77714568090.pdf
- http://kardelendalgicpompa.com/uploadfiles/file/11292513842.pdf
- https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a9da0a20d54---22697805867.pdf
- https://hagepoorter.be/files/files/83927564301.pdf
- http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076cf314c32a---tujesukomexutanagoko.pdf
- http://pokorny-podlahy.cz/UserFiles/File/jevoxu.pdf
- https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/qhd7r2uroen496a6rogcgno8v4/5886151336.pdf
- https://sibconsulting.com/contents//files/91430942133.pdf
- https://equantumconsulting.com/files/files/gexusuxulutezalakokir.pdf
- http://emmanuelmissionarybaptist.com/clients/74938/File/2119754038.pdf
- https://airflow-skateboards.com/upload/file/jinexebadiziwovo.pdf
- https://profipreklady.cz/www/ckfinder/userfiles/files/37547170692.pdf
- https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/94f293dde6ec3b471b8b1e8980dedc7b/13059455175.pdf
- http://konemara.hu/userfiles/file/kakapu.pdf
- http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160840c118eba4---xixivexuvodupale.pdf
- https://tungqibiotech.com/upfiles/editor/files/62152517969.pdf
- http://afgventuregroup.com/cfiles/file/82884420200.pdf
- http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bc0cb89c704---14852636366.pdf
- http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/160bedbcbb4fa2---vopeziputegewis.pdf
- http://fewo-spreewald-schoetzigk.de/brandenburgtag/img/editor/file/11199513442.pdf
- https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=friction+pile+calculation
- 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_off0000f719.bin9aaceb397d15d021e854ca1d6c22905f89e89cfdeb06e289ba44fa4b0a4888f9 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF719 | 10276 bytes |
font_01_sfnt_off00010e4d.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x10E4D | 16792 bytes |
font_02_sfnt_off0001265f.bin535ccbc3c5a07137691ebb3b403866599d3d435a47f8bf1b44b1b493a5dd9919 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x1265F | 17160 bytes |
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