MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. It contains numerous URLs pointing to compromised websites, suggesting an intent to redirect users to phishing pages or download further malware. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a large number of links on potentially disposable hosting, further supporting the malicious intent.
Machine Learning
- Nyx PDF Classifier malicious score 0.9972
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://krisoc.ru/uplcv?utm_term=ventricles+of+the+brain+contain
- http://alexforstarlight.com/clients/4/41/4125d763bdae894b2c088b8c4c0f4705/File/50814163668.pdf
- https://lifesmart.ro/ckfinder/userfiles/files/nulusepamapelo.pdf
- https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/d0406ef3cc93914b68771d5074335123/68130846577.pdf
- https://cometsecurity.in/admin/userfiles/file/94621661938.pdf
- http://ash-graphy.com/userfiles/file/wigodibupizenavijisi.pdf
- http://expresskaliski.info/file/95609335605.pdf
- https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f222c4dd4e---20125301842.pdf
- https://mimpi1pusat.com/contents//files/movugunibewasegifijaxuze.pdf
- https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/a598f1d82e8d4b8668ed99997c4ff8a3/dirinipuxagi.pdf
- https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609f7a6199566---gosonujozoxanesoxiruje.pdf
- https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5f9eaad0a5---96052794904.pdf
- https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/5c24b544cefa019eaee76b54bfaac0af/94628591233.pdf
- http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dffdb44c090---misurijagivesorijusomol.pdf
- http://assushop.com/userfiles/assushop.com/file/gogazuwidojitujof.pdf
- https://lightspec.com/wp-content/plugins/super-forms/uploads/php/files/defa30f901f3522be6a7f1de78bdecc0/lamamiwani.pdf
- https://lescourailleurs.com/upload/editor/file/79156112015.pdf
- https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9efb3b8d7---nipupivuvafex.pdf
- http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/160abdd6a13cdb---27307307311.pdf
- https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/9017826d81112161eacfada7f66f865f/bowimoxevojefig.pdf
- https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/h9mhn9k2j25s5v9vbf26vjhgo0/niganepigose.pdf
- http://bbdecontra.com/userfiles/files/17947922621.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_off0000eba9.bind07a3fd5452f0ddcd44e73bca5742366ad1c51c5d6347ae61bffa2a53354aaea |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xEBA9 | 10544 bytes |
font_01_sfnt_off000103ac.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x103AC | 16792 bytes |
font_02_sfnt_off00011bbe.bine7bf4784a8a0b07781d36bd86bc827fdac7e7e1856ec47ee4fd4eeee588c5508 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x11BBE | 16508 bytes |
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