MALICIOUS
196
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of numerous external URIs, including links to compromised CMS upload storage and link farms on disposable hosting, suggests a phishing or malware distribution scheme. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely instructs the user to open a password-protected archive, a common tactic to bypass gateway security.
Machine Learning
- Nyx PDF Classifier malicious score 0.9965
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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Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LUREDocument gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
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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://cructi.ru/uplcv?utm_term=associated+legendre+differential+equation+pdf
- https://bibonatura.hu/ckfinder/userfiles/files/mofanosabuxujavifome.pdf
- http://aygroupmuh.com/image/files/46635006869.pdf
- https://luminex.pl/upload/file/89058473729.pdf
- https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/fpdsjb1kvunmkrlj78p7pkcpcm/japelusirukopifepulawi.pdf
- http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a6d8917858c---71788176369.pdf
- https://andrejc.si/files/file/nifoxitefamuvubugip.pdf
- http://caphegiabao.com/upload/fck/file/nuxamin.pdf
- https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/1a1c97dfbafca38705b50cc90b626061/navudikakesadan.pdf
- http://wasserentkalkung.at/ckfinder/userfiles/files/82771978534.pdf
- http://cz-synergy.cz/data/file/sugumata.pdf
- http://xn--80aaae7amexjfdlfdfg.xn--p1ai/files/file/bilezipagit.pdf
- http://gps-tw.com/CKEdit/upload/files/lunupezipotomuvefavusi.pdf
- http://polskienarty.pl/data/aktualnosci_imgs/file/13583887631.pdf
- http://mrtowing.ca/Lawyers/userfiles/file/metozewoxuva.pdf
- http://upservice.expert/admin/ckfinder/userfiles/files/fovigozufapibij.pdf
- https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/cntjk50jn642qa1iq3cfcgelgg/nulogezixog.pdf
- http://phongkhamthienhoa.vn/images/files/majumuraxeru.pdf
- http://zabradli-znerezu.cz/userfiles/file/69823082431.pdf
- http://hyundainhapkhau.net/upload/files/80099469501.pdf
- https://esz.jp/img/editor/files/pukoxilidid.pdf
- https://cottingham-group.com/cufiles/files/tojegaru.pdf
- https://truck-diagnostic.ru/wp-content/plugins/super-forms/uploads/php/files/bb6eb6eef1a30f29d525d4177df80937/loregulab.pdf
- http://xn--clinicaquirogavilario-vbc.com/wp-content/plugins/super-forms/uploads/php/files/4p9lvlm6i45ptd303ijqkk1277/49420825770.pdf
- http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609b14b6934c9---69947411914.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_off00010385.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x10385 | 16792 bytes |
font_01_sfnt_off00011b97.bin3d8b47b209cb0d46b4cf18503801d84d5c2e947176ce40618d47accabbf7f87d |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x11B97 | 20908 bytes |
font_02_sfnt_off0001520e.binf7b0bc5178438a57e48e528dcede39c32650b0e03cf70484ce403b03c4a7a77f |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x1520E | 11020 bytes |
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