MALICIOUS
196
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, suggesting a phishing or malware distribution scheme. The presence of embedded URLs and the nature of the heuristics point towards an attempt to redirect users to malicious content, likely as part of a spearphishing campaign.
Machine Learning
- Nyx PDF Classifier malicious score 0.9994
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 https://inwebjor.ru/uplcv?utm_term=12th+commerce+book+keeping+%26+accountancy+textbook+pdf+2020
- https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/cc6ef5734375dad5f64ffa8070f1ea78/36517657234.pdf
- http://olympiad-bigben.ru/ckfinder/userfiles/files/venasuxivisifiwo.pdf
- http://blfimmobiliare.com/userfiles/files/mogikokodadokuteliluno.pdf
- http://ural-resyrs.ru/data/file/83536556842.pdf
- http://location-venise.com/italie_documents/files/wikanit.pdf
- http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1607e458bf0d47---13637833612.pdf
- https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/160c1beb63116c---viruvot.pdf
- https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/03aef6c729ac0dca8d39324f273af3e8/maguguwezoturixiwufug.pdf
- http://erdivigado.hu/userkepek/file/bikepekexabinuj.pdf
- https://capital-publishing.com/ckfinder/userfiles/files/givenusugikunagezivatogik.pdf
- http://serdceprirody.ru/userfiles/file/dozifalasizigezovajuvubek.pdf
- http://euro520.net/userfiles/file/1625353818128764781.pdf
- http://blossomtour.net/FileData/ckfinder/files/20210814_BF668A380C5646C2.pdf
- https://stratasphere.online/userfiles/file/68598895648.pdf
- http://isystem.hu/ckfinder/userfiles/files/50666658111.pdf
- http://reclamesticker.nl/images/uploads/file/bonimesax.pdf
- http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/1k6d91go2k1t0qo2oj8h2fiqs1/34100831890.pdf
- http://www.deep2001.com/images/library/File/53964767324.pdf
- http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/fed649804c4a503c45c8be4880ad127e/60630088780.pdf
- http://pivotal-technologies.com/userfiles/file/punupamijirimalu.pdf
- https://ruedi-leuthold.com/userfiles/files/6495323052.pdf
- http://smartvoicecom.com/userfiles/67858272224.pdf
- http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/1610ae2501c8f7---41755243855.pdf
- http://seritour.com/rsm/files/nezawidej.pdf
- https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/16117b81f37993---48135304168.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_off0000c166.binafcc491c4937fc8b38a118470ed35d4f97d3e44c50315c076e84d639176569cb |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xC166 | 10752 bytes |
font_01_sfnt_off0000d9bc.binf6a0990f866a2eb3fafeda8ff351e6bebc5aec71089e9548acffc009810fead4 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xD9BC | 16280 bytes |
font_02_sfnt_off000103a5.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x103A5 | 16792 bytes |
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