MALICIOUS
196
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.007 JavaScript
The PDF contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains keywords related to mathematical formulas, likely a lure to disguise the malicious intent. The ML classifier and ClamAV detection strongly indicate maliciousness.
Machine Learning
- Nyx PDF Classifier malicious score 0.9998
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://medvor.ru/uplcv?utm_term=how+to+find+the+perimeter+of+a+semicircle+formula
- http://bocghebinhduong.com/media/ftp/file/29685261879.pdf
- https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d1ee4cb09e---89898832169.pdf
- https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/dfc5210300909a98c0c15cc4c54fd390/nuvatinolib.pdf
- http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607238acbe00a---loxitosepebizugetofobov.pdf
- https://bayardplaza.co.uk/wp-content/plugins/super-forms/uploads/php/files/g8s51ff3t66bsjrf4vebckc9ej/kibumirezupurifotakar.pdf
- https://area34.info/wp-content/plugins/super-forms/uploads/php/files/lplsi9p2k7dj1ijv3obertlau1/xazok.pdf
- http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609df98fbdacf---vodep.pdf
- http://richmore.kr/uploadfile/fckeditor/file/1800623051.pdf
- http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d952969d46---24691707598.pdf
- https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/ppjslt2scjblebhp40omltgl47/95675224382.pdf
- https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bb82522dd67---23281326210.pdf
- http://www.aluvascientific.com/UserFiles/file/vetiwe.pdf
- http://doublehappyvstheinfinitesadness.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099ba6bb3fed---sawaliromufamesezuzuniru.pdf
- https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/f0gjvsp1b1tdu18fhb4r3i0i40/gidup.pdf
- https://brothers-music.com/ckfinder/userfiles/files/muwimekujulunalu.pdf
- https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/50029043270.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- 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://scripts.sil.org/OFL
Extracted artifacts 2
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0000cddc.binfd662b1181e8b4190334739c7d7a9ddb6f15cf4d7c8c1f00ba29cd0f415482f0 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xCDDC | 5448 bytes |
font_01_sfnt_off0000e04a.bincc2e8bc5cbb9af4bb12dc9ab7dc2b262587825059fe69c3760900688529555fc |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE04A | 11740 bytes |
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