MALICIOUS
184
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
This PDF document contains embedded JavaScript and numerous external URLs, many of which point to compromised WordPress sites acting as link farms. The heuristic 'SE_CALLBACK_LURE' indicates the document's content is designed to trick users into calling a phone number, a common tactic in callback phishing and tech support scams. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to facilitate further compromise or information theft.
Machine Learning
- Nyx PDF Classifier malicious score 0.9981
Heuristics 8
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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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Callback phishing phone lure medium SE_CALLBACK_LUREDocument asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
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Embedded JS stream low PDF_JSPDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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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=recovery+no+command
- https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/d3742bd61a550df6e48a8ddc022d7ac8/menunogigapijojoxaxuf.pdf
- http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1612f466344c74---27720855027.pdf
- http://toanlinh.vn/upload/files/zinodarezinobiwixe.pdf
- http://tgroupsrl.com/userfiles/files/24200948005.pdf
- https://jin-ji.com/upload/files/41073922341.pdf
- https://rlmahtani.com/userfiles/files/nutojitikoluketepapuva.pdf
- https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/16136f2409df99---26114505883.pdf
- http://xn--90aoa5aj.xn--p1ai/ckfinder/userfiles/files/35799283856.pdf
- https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613f847ecee36---lokomaselogopesamaguzu.pdf
- http://hebakotb.net/userfiles/file/gisuxixu.pdf
- http://thanhcongtechtra.com/upload/files/vutipu.pdf
- http://wideanglepackaging.com/ckfinder/userfiles/files/89681505029.pdf
- https://ckmusicdesign.nl/userfiles/file/vikininejukasajufox.pdf
- http://xn--o39a91gvwm83kbsn.com/FileData/ckfinder/files/20210917_8F4E1F606B65DE8E.pdf
- http://fullx.net/files/18469777055.pdf
- http://all-vehicle.net/js/upload/files/nuzerojuzud.pdf
- http://virtualcharityevents.com/vce_cake/files/files/basewujomotim.pdf
- https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/30a5fecaefa1ceb03e861c8e507fedea/foxisudelupugurox.pdf
- http://www.ufolep-69.com/contenus/files/modazulopomawakati.pdf
- https://jamurgoreng.net/contents/files/zamowotubezadigifexuwif.pdf
- http://elementsgogreen.com/userfiles/file/wijamiwobu.pdf
- https://stayinbranson.com/ckfinder/triplebuserfiles/file/59913447699.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_off0000dab6.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xDAB6 | 16792 bytes |
font_01_sfnt_off0000f2c8.bin3acc2648a0d4737090ab9ef33f45936f472fac9e35c0352cb9bcf0ac4b357766 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF2C8 | 18556 bytes |
font_02_sfnt_off0001232c.bin5f4c0d6dfc4a0accb0f716bc291a6c0bab40d869556c4c03e363aefde94540da |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x1232C | 10352 bytes |
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