MALICIOUS
164
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The sample contains embedded JavaScript, which is often used to redirect users to malicious sites. Several heuristics indicate the PDF is a link farm hosted on compromised or disposable domains, with one URL specifically mentioning a 'brother mfc 885cw manual' to lure victims. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.
Machine Learning
- Nyx PDF Classifier malicious score 0.9963
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 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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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 http://mtcclassof81.com/clients/0/0a/0a45bd3013a8cc77df817aa526a911b1/File/poxelufenol.pdf
- https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160870a03d41ea---25513300900.pdf
- http://www.retorika-zidar.si/ckfinder/ckeditor_uploaded_files/files/58897843847.pdf
- http://supermarketdv.ru/files/file/nilepuponubinijopenade.pdf
- https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/v0il9td05a5ueva8bmjlspi7o3/junumepususase.pdf
- https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/em0lgumunf7vqkge0sbh0v4qs5/welamilujufimuz.pdf
- https://duext.com/wp-content/plugins/super-forms/uploads/php/files/802ded8d12edfcf35df8f0f70233648d/70788973377.pdf
- https://psihodesk.ro/ckfinder/userfiles/files/xigozogufosebilobabibe.pdf
- https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa6540f9ee---vedejo.pdf
- https://www.explosivo.gr/wp-content/plugins/super-forms/uploads/php/files/7347afb59889852a8eebd8cf881511cb/pemabejovamuduworotamin.pdf
- https://alshamiltrading.com/alshamilfiles/file/7510287506.pdf
- https://aluminiosarla.com/userfiles_arla/files/jegiputexotu.pdf
- https://speak82.com/_UploadFile/Images/file/vadusojamabaxuwoga.pdf
- https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/4539a587eb8536d4d7cddd96a0b93846/69183598400.pdf
- http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097f07c7af28---ludalobaxunutofavukafa.pdf
- https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071a424ca821---97824230197.pdf
- https://hunde-katzen.at/soubory/lupebuvopixujifexadad.pdf
- https://www.tulsarad.com/my_content/js/ckfinder/userfiles/files/dezulemajexo.pdf
- http://greenbiotech.vn/uploads/userfiles/file/7572560525.pdf
- http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6a4968edbd---36770481554.pdf
- http://rafaelokazakov.com/file/38156841427.pdf
- http://budohurtsa.pl/userfiles/file/funuxojeziwitek.pdf
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=brother+mfc+885cw+manual
- 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_off0000c248.bine1b763e2457e63cd514660fecb7ccb0b1072ac2e3dccee98c1978544c68bf5af |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xC248 | 10924 bytes |
font_01_sfnt_off0000db99.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xDB99 | 16792 bytes |
font_02_sfnt_off0000f3ab.binf485361819546d317f416639d54bb0792fec05e2dddfaa22be4b153d68fbfede |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF3AB | 16636 bytes |
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