MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicated a high probability of maliciousness. It contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting a link farm or phishing lure. The document body is heavily obfuscated and appears to be generated by wkhtmltopdf, which is unusual for a typical document and may be an attempt to hide malicious content or exploit.
Machine Learning
- Nyx PDF Classifier malicious score 0.9956
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://infrive.ru/uplcv?utm_term=atomic+structure+and+periodic+table+review+answers
- https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16070be985009f---28822440861.pdf
- https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/7c0d379ac8a62f4bb950c2f1a6a6a451/95982263029.pdf
- http://kondicionery-lubertsy.ru/upload_picture/file/sasinavisevolan.pdf
- https://coonvalleycc.com/userfiles/file/leturinelusepenikukuko.pdf
- https://doellefjelde-mussemarked.dk/images/newsmail/file/43116353841.pdf
- https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/4u9s8ppnheare1p4rbefugu9fv/1396744021.pdf
- https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/a40175072e20c65cd872150d824bad5f/45454319289.pdf
- http://www.allatpatikapecs.hu/images/file/wodadalukorojolavugoxew.pdf
- https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160d2780e55f45---98126062601.pdf
- http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608693c3f13bc---jadebinamotilegejobad.pdf
- http://rideco.hu/upload/file/ronoru.pdf
- https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/7289b4bdd0ebe03b6a155a4d62ed8c3a/zifireje.pdf
- https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/246ded79a530aa4faefec95a711be87b/88026417044.pdf
- http://sistarelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/60654429118.pdf
- https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/fd8d533697ba2b4e32e2836ce7d17b5e/49192689911.pdf
- https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/d6cc3f7c90bb8cae04f39bc2a6e7e8b9/gegodufekobawusa.pdf
- http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b8a6d07e20e---98287536204.pdf
- http://agnieszkapawlik.com/userfiles/file/fipapuzad.pdf
- http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607416b1609d6---xogujarevepipazajevi.pdf
- http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/n3j3c84m4ba20103e7ogb2gir5/17449672990.pdf
- https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/271ab82d23a358a77e5f11b16c55c23e/lutanomowotuxegobevad.pdf
- https://amerismithenterprises.com/wp-content/plugins/super-forms/uploads/php/files/97168201fe3dcde97b782e7040d42f04/farusupanaleri.pdf
- https://bititechnika.com/uploads/file/remigu.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_off0000ea43.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xEA43 | 16792 bytes |
font_01_sfnt_off0001025a.bin9b213a6194c4fdd5b9bc4501983d600e0e2bdf57f448bd3873d47fa01f027702 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x1025A | 11048 bytes |
font_02_sfnt_off00011bdc.bind6c4e5440622d9bbf7385a316e6bceed7ce47705f36d3897723d25b619a4d825 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x11BDC | 17100 bytes |
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