MALICIOUS
142
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1204.002 Malicious Link
The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm and contains elements of a fake invoice lure with a visual download button, suggesting an attempt to trick users into downloading further malicious content. The presence of numerous external URIs, including one pointing to a potential redirector, reinforces this malicious intent.
Machine Learning
- Nyx PDF Classifier malicious score 0.9976
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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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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Fake invoice / payment lure low SE_INVOICE_LUREDocument contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
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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://chcial.ru/uplcv?utm_term=judit+polgar+book+pdf PDF link annotation
- http://www.serenissimaservizi.com/files/74145677716.pdfIn PDF document text
- http://www.slenderclub.cz/ckfinder/userfiles/files/10132591089.pdfIn PDF document text
- https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613018a827eb6---bemovepexeb.pdfIn PDF document text
- http://onlinepravenconsultant.com/uploads/wysiwyg/files/30662585301.pdfIn PDF document text
- http://tataservice.it/userfiles/file/29851816880.pdfIn PDF document text
- http://j-line.ca/fck_upload/file/76960053136.pdfIn PDF document text
- https://fundoohairstyles.com/hairstyler/images/file/petavozupatofoges.pdfIn PDF document text
- http://vibrobeton.by/pics/files/73911333167.pdfIn PDF document text
- http://museodegliarazzimarsala.com/userfiles/files/lebedesijopo.pdfIn PDF document text
- https://larioenergy.net/uploads/file/fizuforaruwa.pdfIn PDF document text
- http://ptichile.cl/userfiles/file/38597229103.pdfIn PDF document text
- https://uudanbury.life/files/file/kavuzunix.pdfIn PDF document text
- http://donovaly-ubytovanie-safran.sk/web/userfiles/file/kezilaku.pdfIn PDF document text
- http://patanamachine.com/imgUpload/files/ladibujuwirob.pdfIn PDF document text
- http://weiddy.com/uploads/files/202109091449141580.pdfIn PDF document text
- http://lanaecoloridabruzzo.it/userfiles/file/4646588676.pdfIn PDF document text
- https://kalashad.com/userfiles/file/pipepe.pdfIn PDF document text
- https://negaratoto.com/contents/files/34422917510.pdfIn PDF document text
- http://tortsurprise.ru/upload/redactor/files/loxujowiguzedoregobezexo.pdfIn PDF document text
- http://granitemountainranch.net/userimages/xutadaxit.pdfIn PDF document text
- http://nesthomes.in/userfiles/file/fajazirigagewesaveti.pdfIn PDF document text
- http://namhungholdings.com/uploads/ckfinder/files/kuregexurerogisuduwoj.pdfIn PDF document text
- https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131ff8e9f4fb---5807057798.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_off0000c490.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xC490 | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_01_sfnt_off0000dca2.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xDCA2 | 17968 bytes |
SHA-256: d96e5e709eb59db058e88253a355704a75b47deb13dae18ecc463d4956945770 |
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font_02_sfnt_off00010bcd.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x10BCD | 10592 bytes |
SHA-256: d6aade76fb084a74a5e4b4c2aad0fd4eb8232fa856d069c302d4104364809908 |
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