MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1204.001 User Execution: Malicious Link
The sample was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It functions as a link farm, directing users to multiple compromised or disposable hosting sites, many of which are associated with WordPress upload vulnerabilities. The document body is unreadable, but the heuristics indicate a deliberate attempt to obfuscate the true nature of the links.
Machine Learning
- Nyx PDF Classifier malicious score 0.9942
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://orrizon.ru/images/file/nezezuguwaloxam.pdf
- https://iohrp.org/f_files/files/72151563584.pdf
- https://famecosmica.it/file/89053020003.pdf
- https://cualuoihoanmy.com/uploads/userfiles/file/77631899568.pdf
- http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a54804c9232---37253971969.pdf
- http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/gnr51d67ea6gjn5ddr516kn1cu/440565756.pdf
- http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/ca5146b151739760eb866b2cc258be77/31292684438.pdf
- http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608408836df2c---27828395714.pdf
- https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/69cb41772b5e11306b468456852a4ac1/bubidusisugibaxafusu.pdf
- http://xn--e1aaafipco3bk8gra3b.xn--p1ai/upload_picture/file/81221478243.pdf
- http://esoftland.com/userfiles/file/41824124155.pdf
- http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/68749nrdemtgqhge02qadeku62/kezefufawufoxebamelubi.pdf
- http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16089fded5738c---3604863949.pdf
- https://computerzone.pk/file/vomatam.pdf
- http://iglozawiercie.pl/zdjecia/file/80697050768.pdf
- https://aprilboya.com/userfiles/file/24559001593.pdf
- https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/b2e3ada86054094ffa7e1071532b71d3/kujerilonalesinapulibi.pdf
- http://curry-box-deluxe.de/userfiles/file/damikajosonos.pdf
- http://stromzeleny.cz/file/32762713637.pdf
- http://sam-global.info/files/file/45529527437.pdf
- https://martybermanassociates.com/wp-content/plugins/super-forms/uploads/php/files/ce5f64a9ab099452c60f0ef80c0ed121/dusivazapukalip.pdf
- http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ac7f41dee0---watuvupirimesuwudiwo.pdf
- http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/85cd41b445b5b78960bb8d41ff5fbe25/87900707390.pdf
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=naming+and+classifying+microorganisms
- 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_off00011100.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x11100 | 16792 bytes |
font_01_sfnt_off00012917.binf4227c255b608d3f9f4a609e2764c95467aab2cf2720e8057bfb561ba947ac99 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x12917 | 10680 bytes |
font_02_sfnt_off00014144.bin4312e74894ecea80d0b480f50e38cb4cbaf3256842f60a060be635306ad7ed1a |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x14144 | 16680 bytes |
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