MALICIOUS
134
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The PDF contains numerous links to external PDF files, many hosted on disposable domains, indicating a link farm designed to obscure the true malicious destination. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were directly extracted, the PDF structure and heuristic firings point towards a malicious document designed to trick users into downloading further malicious content.
Machine Learning
- Nyx PDF Classifier malicious score 0.9953
Heuristics 6
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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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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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Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTONDocument contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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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://premiersuli.hu/files/files/12578469.pdf In PDF document text
- http://ijdssymposium.eu/upload/36002611190.pdfIn PDF document text
- http://nenayu.com/filespath/files/20210906142638.pdfIn PDF document text
- https://doxity.ro/ckfinder/userfiles/files/69334400296.pdfIn PDF document text
- http://pevak.info/UserFiles/File/28625127608.pdfIn PDF document text
- http://ventima.ru/userfiles/file/56793602859.pdfIn PDF document text
- http://anhuifan.com/upload_fck/file/2021-9-6/20210906093700629452.pdfIn PDF document text
- https://www.nitdgp.ac.in/uploads/userfiles/files/59266954204.pdfIn PDF document text
- http://sl-light.ru/design/img/upload/file/madokikafowi.pdfIn PDF document text
- http://namlinhchivietnam.net/userfiles/image/file/64922346036.pdfIn PDF document text
- https://lanhcongnghiepthinhphat.com/upload/files/bukedike.pdfIn PDF document text
- http://avatars.ru/userfiles/file/pinitimedizemux.pdfIn PDF document text
- http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/1612e9d61268fd---juxoxetoxuvutopa.pdfIn PDF document text
- https://topclassgardening.nl/images/file/koxuguvuvalirovep.pdfIn PDF document text
- http://fujieshubao.com/zk/UploadFile/file/2021090122481373499.pdfIn PDF document text
- https://greenfuturevietnam.com/Upload/files/bapumomizopiwamenenewul.pdfIn PDF document text
- http://pferdefreunde-brueckenhof.de/sites/default/files/userfiles/file/92682285823.pdfIn PDF document text
- http://dlzj.net/upload/files/20210905190742963914.pdfIn PDF document text
- http://csc-0411.com/userfiles/file/20210904235944_tvgokm.pdfIn PDF document text
- http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613558c1d5afb---2711706350.pdfIn PDF document text
- https://hizlipin.com/calisma2/files/uploads/21221741997.pdfIn PDF document text
- http://wu-pao.com/upfiles/editor/files/12218302761.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=game+guardian+apk+download+iosPDF link annotation
- https://tes-sys.com/uploads/ckfinder/files/20210906/16309423136621.pdfIn PDF document text
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
Extracted artifacts 3
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0000be73.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xBE73 | 17028 bytes |
SHA-256: c4b875a4c979d35814ec6785f232bba69d410cd88197cc96c36f02da202f2b86 |
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font_01_sfnt_off0000eadb.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xEADB | 10956 bytes |
SHA-256: c48778dc396fa60172decabf8d4b19328bf6881260ac8e16cb5cbb85d2794ca4 |
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font_02_sfnt_off00010411.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x10411 | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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