MALICIOUS
126
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 structured as link farms on disposable hosting, suggesting a phishing or malware distribution scheme. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a tactic to obscure the true malicious destination. No scripts were extracted, but the presence of external URIs is a strong indicator of malicious activity.
Machine Learning
- Nyx PDF Classifier malicious score 0.9973
Heuristics 5
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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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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://infrive.ru/uplcv?utm_term=schaum%27s+outline+probability+and+statistics+solution+manual+pdf PDF link annotation
- https://archielectronics.com/userfiles/files/59447268889.pdfIn PDF document text
- http://dreamcatcherltd.com/userfiles/file/pudubijivemorusigudogedox.pdfIn PDF document text
- https://efficientinfocomm.com/ckfinder/userfiles/files/venikuzusawi.pdfIn PDF document text
- http://china-zub.ru/userfiles/file/sugekexumidalexipitevo.pdfIn PDF document text
- http://inistor.com/ufiles/files/zatorevolijinujuweluxojid.pdfIn PDF document text
- http://obrienbuilders.com/userfiles/file/67550263367.pdfIn PDF document text
- https://aljuboori.com/userfiles/files/tufadegidebibabinugozu.pdfIn PDF document text
- http://filippodelvita.com/demo/userfiles/file/tajupamokika.pdfIn PDF document text
- https://bartonsteel.com/tony/barton/ckfinder/userfiles/files/tojefaxexeximawulijefo.pdfIn PDF document text
- https://chupwo.com/editor_upload/file/merib.pdfIn PDF document text
- http://sydjpg.com/images/upload/file/20210908_220346_103.pdfIn PDF document text
- https://sergiomauri.com/images/file/dilubikebadalum.pdfIn PDF document text
- http://xecuoihuyhoang.com/uploads/userfiles/file/99529010309.pdfIn PDF document text
- http://elskup.pl/images/assets/file/jujoledovibigebezazatuku.pdfIn PDF document text
- http://zamokugrofa.sk/admin/fckeditor/file/32819101143.pdfIn PDF document text
- https://hinaweb.com/upload/file/52655824667.pdfIn PDF document text
- https://worldcastlive.com/userfiles/file/23237172419.pdfIn PDF document text
- https://anaksemut.com/contents/files/benorusomof.pdfIn PDF document text
- http://adhunikjewellers.com/ckfinder/userfiles/files/runobelifapusonono.pdfIn PDF document text
- http://votava2.altrodesign.eu/ckfinder/userfiles/files/powikag.pdfIn PDF document text
- https://gamma-electronics-eg.com/userfiles/files/76520138538.pdfIn PDF document text
- http://saveondealz.com/ckeditor/ckfinder/core/connector/php/uploads/files/kikixovo.pdfIn PDF document text
- https://magicdiscoradio.hu/userfiles/file/18931223446.pdfIn PDF document text
- https://actioncoach.com.my/wp-content/plugins/formcraft/file-upload/server/content/files/16136e1e9c0dda---83855590639.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_off0000ee2e.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xEE2E | 11348 bytes |
SHA-256: 1d441c9e0de40800f9fe4da7a26aa03c2371c8a07a76f3da230057f6ac6b9afd |
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font_01_sfnt_off00010881.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x10881 | 18776 bytes |
SHA-256: a470fd48129578a083b6f37c5580a8e36874a187211e55710685421338e01c52 |
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font_02_sfnt_off0001395e.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x1395E | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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