MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to external sites, many of which are hosted on compromised or disposable domains, suggesting a link farm or phishing lure. The presence of PDF-specific heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' further supports this. While no scripts were explicitly extracted, the nature of the URLs and the PDF format suggest potential for JavaScript execution to redirect users.
Machine Learning
- Nyx PDF Classifier malicious score 0.9953
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://inwebjor.ru/uplcv?utm_term=turn+on+usb+debug
- http://owv-sad.de/userfiles/files/11542531074.pdf
- http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/161415556d63d5---98876407775.pdf
- http://vertracapital.com/uploads/files/69430527106.pdf
- https://akconta.com/uploads/files/69967745032.pdf
- https://stratasphere.online/userfiles/file/78763896701.pdf
- https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/161388e8c7d963---74022243304.pdf
- http://nhac.ditimchanly.org/Images_upload/files/mizakigalegusaxutekopo.pdf
- http://kolkandkolkdesign.com/site/data/ws/files/katadosuwuwuwujexipalu.pdf
- http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161382a1bd97b7---tikokujipuwapen.pdf
- https://sssmri.com/ckfinder/userfiles/files/65219849997.pdf
- https://phnews.ro/files/file/nuvafakodomowopovunataz.pdf
- http://mrs724.ir/basefile/drtiketcom/files/67446740778.pdf
- http://effektfilm.de/files/file/80165701015.pdf
- http://mebel-moscow.com/content/xuploadimages/file/medebisiduf.pdf
- http://stelmart.ru/userfiles/file/90777833607.pdf
- http://viettelhaiphong.me/data/dulieu/files/69521864468.pdf
- https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/babd6c9c435aefdd2c4dfba80bdec581/fafofufizezixo.pdf
- https://deltagroup.bg/uploads/file/gozolefubalinisu.pdf
- http://kadh.kr/bobod/upload/file/bejugarovu.pdf
- http://thienthaopc.com/upload/FCK/file/89352872211.pdf
- https://parklanehotel.asia/userfiles/file/zikofeneloxu.pdf
- http://nanoservice.cz/upload/file/zubupulitomoguwetubagafor.pdf
- http://heatexchangersolution.com/upload_fck/file/2021-9-3/20210903201645183107.pdf
- https://willmarareachamber.com/ckfinder/userfiles/files/denipifuduvumu.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_off0000d24c.bin437e68041de69d4c7f87d0a6db152a8aa67fae569ad27d5dcd2b13422f09d1e9 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xD24C | 17088 bytes |
font_01_sfnt_off0000fe1e.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xFE1E | 16792 bytes |
font_02_sfnt_off00011635.bin8ed3e2f21942e2807e703263cca7461d9ccb51c62f9ff8d4d61a266aa8cb3339 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x11635 | 10228 bytes |
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