MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1204.002 Malicious Link
The PDF contains numerous external links, many pointing to compromised or disposable hosting domains, indicative of a link farm designed to lure users to malicious sites. Heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' strongly suggest this malicious intent. The ML classifier and ClamAV detection further confirm the malicious nature of the file.
Machine Learning
- Nyx PDF Classifier malicious score 0.9951
Heuristics 6
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ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTIONClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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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://chcial.ru/uplcv?utm_term=android+upload+photo+to+facebook
- http://energyexcess.com/userfiles/file/tisulilazenepova.pdf
- http://alpes-maritimes.proximeo.com/ckfinder/userfiles/files/gijilu.pdf
- https://amityhr.com/userfiles/file/16718385330.pdf
- https://butchercurnow.com/img/shop/contents/99880049356.pdf
- http://marinaxaraes.com.br/ckfinder/userfiles/files/miwotom.pdf
- https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/1612ea3de7cac7---dewut.pdf
- http://propack-th.com/image/upload/File/dojerifozejojutez.pdf
- http://icmasistemas.com/userfiles/files/42193236146.pdf
- https://netcsemege.hu/ckfinder/userfiles/files/zakoxegesinugibilivenoxa.pdf
- http://studiotecnicomartani.eu/userfiles/files/94836314962.pdf
- http://conomiya.com/images/uploadedimages/file/borobogodepemobogewaguv.pdf
- http://vietcem.vn/public/default/ckeditor/files/jutulo.pdf
- https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614ae859ba999---rigora.pdf
- http://komputerzagrosze.pl/userfiles/file/46540079257.pdf
- https://birsamundapark.in/userfiles/files/batoga.pdf
- http://biosafety.biz/ckfinder/userfiles/files/vopizibevudewotemi.pdf
- http://xn----7sbakif2a3azdub.xn--p1ai/admin/ckfinder/userfiles/files/ravaropetepabutevenu.pdf
- http://nexxosrealty.com/userfiles/files/pefanewefobuwelile.pdf
- http://smart.sut.ac.th/tsme/src/lib/ckfinder/userfiles/files/kevakujutobatalovogon.pdf
- https://thokhoavietnam.com/upload/files/matipalezukemusapeg.pdf
- https://kotypsy.pl/ckfinder/userfiles/files/digikunojezu.pdf
- http://ketphatthinh.vn/upload/files/gadig.pdf
- https://immo-cjeanpaul.lu/userfiles/files/defojomuturanomow.pdf
- https://haps.company/wp-content/plugins/super-forms/uploads/php/files/e52e17391ce9316cbacb97a6d0bdaa96/22420391638.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_off0000b56c.bind225aa8b4cebd6836472f6d09002e7c9a96fdb60af83e00204543d920cbd024d |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xB56C | 17080 bytes |
font_01_sfnt_off0000e14f.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE14F | 16792 bytes |
font_02_sfnt_off0000f966.bin34b5194c624e282a1b3b159a7a0e876745f73b728369ebf0773ff01356874b9c |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF966 | 10860 bytes |
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