Malware Insights
The sample is a PDF file flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable hosting and employing UTM parameters, suggesting a link farm or phishing lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high volume of links on potentially untrusted domains. While no scripts were explicitly extracted, the presence of multiple external URIs and the nature of the heuristics strongly suggest an intent to redirect users to malicious sites for credential harvesting or further payload delivery.
Machine Learning
- Nyx PDF Classifier malicious score 0.9975
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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Clickable URI points to raw IP address medium PDF_URI_IP_LITERALPDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
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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://pistant.ru/uplcv?utm_term=fundamentals+of+algorithmics+solutions+manual+pdf PDF link annotation
- https://ketex.com/trcgp/ckfinder/userfiles/files/noromenatabafiguvob.pdfIn PDF document text
- http://alfonsoguiggiarchitetto.it/userfiles/files/13618453312.pdfIn PDF document text
- https://vetamblj.si/ckfinder/userfiles/files/towemefanefumege.pdfIn PDF document text
- https://zegaoyun.com/calisma2/files/uploads/dugilibaxenazisonagibinit.pdfIn PDF document text
- https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/161421c8799fbd---6124070936.pdfIn PDF document text
- https://hydratrend.com/application/third_party/ckfinder/userfiles/files/75595805455.pdfIn PDF document text
- https://franciscovalles.comtraining.cl/userfiles/files/94971998981.pdfIn PDF document text
- https://mkserwis.pl/userfiles/file/16702702170.pdfIn PDF document text
- http://dreamsurgerycn.com/ckupload/files/85740150050.pdfIn PDF document text
- http://ymjgolf.com/file_media/file_image/file/zepifasamekogukutemewo.pdfIn PDF document text
- http://178.62.148.222:300/ckeditor/ckfinder/userfiles/files/zoguwafotegelezojebiz.pdfPDF link annotation
- http://fujavietnam.com/images/Download/25900257492.pdfIn PDF document text
- https://fzclicks.com/demo/files/editor/file/kixuxegidibowinewafafiven.pdfIn PDF document text
- https://hk-delight.com/UploadFiles/file/raxodojogekaduji.pdfIn PDF document text
- https://bharatceramics.in/ckfinder/userfiles/files/xuxikuzorudalepir.pdfIn PDF document text
- http://airmon.hu/images/files/wewoxugokedutumix.pdfIn PDF document text
- http://lex.tj/img/file/kufolejasozarawof.pdfIn PDF document text
- https://sts-cct.com/app/webroot/userfiles/files/kakixol.pdfIn PDF document text
- http://pastadimatteo.com/ckfinder/userfiles/files/fasarubopapudix.pdfIn PDF document text
- http://kiiga.ru/userfiles/file/gumedef.pdfIn PDF document text
- https://bunexim.dascalita.ro/app/webroot/files/userfiles/files/xozapateganoni.pdfIn PDF document text
- https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/6cf04754397e1325d4da2ec6bf8b1978/2467054041.pdfIn PDF document text
- http://www.patriarca-batiment.com/ressource/site-image/files/lamonogilo.pdfIn PDF document text
- http://alacarte-grafik.de/userfiles/file/milejurov.pdfIn PDF document text
- http://apicn.net/upload/files/78109725471.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_off0000cfcc.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xCFCC | 18216 bytes |
SHA-256: d68d0884cd31c80ce470c9e97f941c4703d375541b952fccd01ecf099d906358 |
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font_01_sfnt_off0000ff8f.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xFF8F | 11144 bytes |
SHA-256: 4c4bb567f776f312ea6099ceb4fad9e1871b84d6710417bac67eb0cf9822303f |
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font_02_sfnt_off0001192c.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x1192C | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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