MALICIOUS
196
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
This PDF document employs a social engineering tactic by presenting a lure to install a browser extension or update, a common method for distributing malware or stealing credentials. The presence of numerous external URLs, many hosted on compromised or disposable domains, suggests a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely involving the download and execution of a second-stage payload via embedded JavaScript or external links.
Machine Learning
- Nyx PDF Classifier malicious score 0.9973
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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Browser extension / update installation lure high SE_BROWSER_INSTALL_LUREDocument tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
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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://queure.ru/uplcv?utm_term=download+ben+10+ultimate+alien+cosmic+destruction+apk
- https://cplastik.net/data/cms/file/movifozuxemoretireke.pdf
- https://sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613af942d4ee5---sikavafeso.pdf
- http://arcenevents.nl/site/upload/files/78414129085.pdf
- http://whatcanidoforyou.eu/publish/file/siriwa.pdf
- https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613335726d9a5---ludisarawojunamufudelefu.pdf
- http://inbond-cn.com/userfiles/file/22630422405.pdf
- http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/d58ff1fb5ff3ae1358480a30fcba00f9/jomotalidusuv.pdf
- https://ceramicasvillaflor.cl/UserFiles/File/sowurabirobovopedodojukob.pdf
- https://zhansq.cn/upload/file/sufatunekalofosawudos.pdf
- http://fpempresa.cen.es/userfiles/files/57597788936.pdf
- http://eco-building.cz/UserFiles/File/46200809449.pdf
- http://kooijobs.in/ckfinder/userfiles/files/16761408326.pdf
- http://najlepsietorty.sk/uploads/fck/file/87324353717.pdf
- https://innotek.vn/uploads/news_file/38127029211.pdf
- http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1614218e16fe3c---sivoxopofalanorog.pdf
- https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/0789b241d25e423b0a6eee9e2f466ae5/63108199007.pdf
- http://chocoenglish.com/_UploadFile/Images/file/liwexosaniribamosoxemeve.pdf
- https://jiu-hang.com/upfiles/editor/files/5893421160.pdf
- http://tootingtaxi.com/survey/userfiles/files/vimupile.pdf
- http://xn--90aoj0agf7cq.xn--p1ai/uploads/files/95018909764.pdf
- http://studiomilano.eu/userfiles/files/20347109835.pdf
- http://www.fonfe.com/uploads/files/kexanuf.pdf
- https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16138a974adf6f---92716905783.pdf
- http://wordtmann.beckbauer.eu/ckfinder/userfiles/files/gililejosez.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_off0000c63c.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xC63C | 16792 bytes |
font_01_sfnt_off0000de4e.bine4a768f5108722a34df10a8bd1c6eb99fc0ca6165947ae85e41d25cca5019b2a |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xDE4E | 17572 bytes |
font_02_sfnt_off00010b2c.bin90f4c21d8c6682f1cab96ed9afd022ac96757618c43debb516384a88a7d92a15 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x10B2C | 11268 bytes |
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