MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised websites and disposable hosting domains. The presence of external URIs and the nature of the detected heuristics strongly suggest a phishing or malware distribution scheme, likely initiated via spearphishing.
Machine Learning
- Nyx PDF Classifier malicious score 0.9969
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://irlanc.ru/uplcv?utm_term=machine+learning+a+bayesian+and+optimization+perspective+2nd+edition+pdf
- http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e3650484bf---gotowuzesujelegumefofu.pdf
- http://ebslang.net/_UploadFile/Images/file/mafudifaz.pdf
- https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160897cb9e2ef0---zivexaz.pdf
- http://shophouse.info/images/files/vupekoranet.pdf
- https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/acb55b3bcf22cba7bdbbb44ff2569cae/latufumulezujukupifana.pdf
- https://myphi.biz/nbloom/fckuploads/file/fumeturesebel.pdf
- http://baaningdoi.com/file_media/file_image/file/44597544824.pdf
- http://auburn-companies.com/userfiles/files/jilozakajafagalunit.pdf
- http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607f5569c6ea9---xokogonibusibujube.pdf
- http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160987110cb249---55083518238.pdf
- http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a9f1015ec56---18258337028.pdf
- http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160800d888670a---7199627788.pdf
- https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c0577b26e9f---dusutugolav.pdf
- http://beijingbeat.com/contents//files/72752435517.pdf
- http://www.deopendeur.org/imgUser/file/67846679754.pdf
- http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/1608448433627c---begesoze.pdf
- http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160a169cb34852---kaxawotegapug.pdf
- http://sgyscom.com/upload_fck/file/2021-6-19/20210619131416741364.pdf
- https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/bd93b6c1df22080fec22b985744d1e53/pozemosuvetisanefo.pdf
- http://gospelinamerica.com/clients/874377/File/2618835530.pdf
- https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd1650673a---bejafesipudevamizomazuf.pdf
- http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bc988255e26---56095884908.pdf
- https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8761c1cb3c---dodub.pdf
- https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/16070f3016ab91---lenorofof.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_off00017bb8.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x17BB8 | 16792 bytes |
font_01_sfnt_off000193cf.bin18ebba1432908ce6359ea44ab5e0f3173168b3b59f3852790566870e28523b27 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x193CF | 11560 bytes |
font_02_sfnt_off0001aeb7.bin2ce68f4adc99a9dbae2445f3052915be440918dc7cc2ad315c11b2fac3843716 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x1AEB7 | 21552 bytes |
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