MALICIOUS
174
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The PDF contains malformed streams indicative of exploit activity and a significant number of embedded URLs pointing to various domains, many of which appear to be compromised or disposable hosting. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution via these links. No scripts were extracted, but the PDF structure and URL patterns are consistent with a link farm used to redirect victims.
Machine Learning
- Nyx PDF Classifier malicious score 0.5449
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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Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTHA PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
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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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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://www.winsum.frl/ckfinder/userfiles/files/54401774590.pdf In PDF document text
- http://attlas.center/userfiles/file/21158901561.pdfIn PDF document text
- https://qnzar.com/files/77622763845.pdfIn PDF document text
- http://scea.edu.mn/ckfinder/userfiles/files/mafexunazivu.pdfIn PDF document text
- https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613eb1250eaa1---vijiwaluvobixagesisu.pdfIn PDF document text
- http://vetsnab32.ru/userfiles/file/togetelonutukimul.pdfIn PDF document text
- http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138ac4522103---mipupefa.pdfIn PDF document text
- http://larrysiegellaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vobawodatuko.pdfIn PDF document text
- https://onlinendttraining.net/files/52110006546.pdfIn PDF document text
- https://olivermilk.com/tctt/sites/aaa/file/20179769184.pdfIn PDF document text
- http://hc6999.com/userfiles/files/49089562042.pdfIn PDF document text
- http://medianet2000.net/amm_prod/image_news_popup/file/54032545184.pdfIn PDF document text
- https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1612f0abf94b70---zapemokosarumedura.pdfIn PDF document text
- https://sanghvicranes.com/staging/media/9077679339.pdfIn PDF document text
- https://mbamantra.com/ci/userfiles/files/91567330629.pdfIn PDF document text
- http://carszana.com/image/upload/File/44677444559.pdfIn PDF document text
- http://www.smartlandgroup.com/ckfinder/userfiles/files/debedazimezopexenob.pdfIn PDF document text
- https://exam11.menapoint.com/app/webroot/upload/files/57847189258.pdfIn PDF document text
- http://saktigroup.in/uploads/82191996909.pdfIn PDF document text
- https://intrigantka.ru/images/userfiles/file/gewidopalarekulabomule.pdfIn PDF document text
- http://uspeh-kursk.ru/ckfinder/userfiles/files/4720656378.pdfIn PDF document text
- https://promptcorporate.com/ckeditor/ckfinder/userfiles/files/wepazumidepovixik.pdfIn PDF document text
- http://tieuhocsongphuong.hoaiduc.edu.vn/ckfinder/userfiles/files/48596031107.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=prepositions+that+start+with+rPDF link annotation
- 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_off0000d969.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xD969 | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_01_sfnt_off0000f180.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF180 | 10392 bytes |
SHA-256: 6ac4db3eca610f7c67595e43668fe342939cc8774541e5837edfa72bb7ee65f9 |
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font_02_sfnt_off00010903.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x10903 | 19080 bytes |
SHA-256: f6fd1dbbf3f05e6c03e6e754e759434890cd9ea3c2198509e0600af7f99f4766 |
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