MALICIOUS
164
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The PDF contains a link farm with multiple external URIs, many hosted on compromised CMS upload directories or disposable hosting. The presence of embedded JavaScript and a high ML classifier score, along with ClamAV detection, strongly suggests malicious intent. The embedded JavaScript likely facilitates the redirection or further payload delivery, contributing to a phishing or malware distribution attack pattern.
Machine Learning
- Nyx PDF Classifier malicious score 0.9953
Heuristics 7
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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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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://highendschmiede.de/highendfiles/file/41128634763.pdf
- http://nwatchonline.info/userfiles/file/kutizenemo.pdf
- http://stellar.ru/ckfinder/userfiles/files/dasabulitemukuzeb.pdf
- https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/321ac8a241409528a16ff32fc3cc7cc5/julovigaronelofibe.pdf
- http://netmode.net/app/webroot/uploads/files/murikexipeboruvu.pdf
- http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613e699691a5a---wirewega.pdf
- https://aslplastic.com/ckfinder/userfiles/files/99738690506.pdf
- http://abwhopewell.com/uploads/files/dilojejivejiluse.pdf
- http://ktcyy.com/ckfinder/userfiles/files/37571349651.pdf
- http://lyzebrno.cz/userfiles/file/zepazu.pdf
- http://swiss-ex.com/images/blog/file/mexinizawovezetorowozod.pdf
- http://kengosushionlineorder.com/uploads/files/96041970185.pdf
- https://imahima.xyz/js/ckfinder/userfiles/files/kekodalurubovafofirebid.pdf
- http://thunderstar.cn/userfiles/file/20210914143326805051373.pdf
- https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130950aae98d---70941734377.pdf
- https://rzfmuhasebe.com/userfiles/file/fufazegufuzekabema.pdf
- http://auburn-properties.com/userfiles/files/wovigixavafik.pdf
- http://qiuyutv.com/userfiles/files/20210904023814.pdf
- http://kasargod.net/uploads/file/telewosubagepikufijof.pdf
- http://primethailand.com/ckfinder/userfiles/files/82579844242.pdf
- http://erh-hu.com/userfiles/file/23587556741.pdf
- http://sbkf.org/files/files/44519704383.pdf
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=metodo+eli+pdf
- http://perfecturology.cafe24.com/upload/editor/imagefile/fiwajosem.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_off0000c9dd.bind8f8731a69b5053e2672e682e742ae4c927ed0e572ddc055575fd8f7e5a705b0 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xC9DD | 9948 bytes |
font_01_sfnt_off0000dfea.bind70dcb79ff0d5df7ac9f72debb1a1a54908c741c10830a39c8af064d80bd05f1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xDFEA | 17840 bytes |
font_02_sfnt_off00010da4.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x10DA4 | 16792 bytes |
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