MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.007 JavaScript
The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URI heuristics and the ML classification strongly indicate a phishing or malware distribution attempt.
Machine Learning
- Nyx PDF Classifier malicious score 0.9948
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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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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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://ketchas.ru/uplcv?utm_term=download+apk+app+lock PDF link annotation
- http://dgjinhak.kr/DATA/upload/files/202109170916484416.pdfIn PDF document text
- http://hometextiles-consultant.com/ckfinder/userfiles/files/59739780195.pdfIn PDF document text
- http://vidol.eu/userfiles/file/zewujexedure.pdfIn PDF document text
- http://burelomdo.com/ckfinder/userfiles/files/15843054869.pdfIn PDF document text
- https://makiriaszto.hu/ckfinder/userfiles/files/dorisonajejekaguwedonineb.pdfIn PDF document text
- http://giteduguedesboires.fr/userfiles/file/92658864334.pdfIn PDF document text
- http://olgapolyakova.com/files/files/71466712878.pdfIn PDF document text
- http://korea-labels.com/ckfinder/userfiles/files/tiferekuvexitelekirafobux.pdfIn PDF document text
- https://endeligmandag.no/e-brev/data/div/loseromoxatebix.pdfIn PDF document text
- http://meadescafe.com/userfiles/file/9597041209.pdfIn PDF document text
- http://brbud.pl/userfiles/file/24887503030.pdfIn PDF document text
- http://sanraimundo.cl/dyn/uploads/file/sepubumamegopafoxa.pdfIn PDF document text
- http://watthaistuttgart.de/userfiles/file/14365377663.pdfIn PDF document text
- http://les-dvorik.ru/userfiles/file/71972971065.pdfIn PDF document text
- https://pmms-online.com/assets/file/25869468295.pdfIn PDF document text
- https://metnar.pl/web/uploads/files/mevubepikuranekez.pdfIn PDF document text
- http://irinaburmistrova.ru/files/livorivuke.pdfIn PDF document text
- https://adlinefor.com/home/webagen/public_html/korn/data/file/patalusukiretivutakogibos.pdfIn PDF document text
- https://soechi.id/userfiles/file/kibuxakew.pdfIn PDF document text
- http://lyzph.com/userfiles/file/Fl202109020130396275.pdfIn PDF document text
- http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1613e23fadcea1---73832446972.pdfIn PDF document text
- https://branchennachweis.eu/userfiles/file/xepili.pdfIn PDF document text
- http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/16136ccc314bd4---84428167678.pdfIn PDF document text
- http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/161436cce97c01---20880135170.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_off0000c850.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xC850 | 10096 bytes |
SHA-256: d0cd7ab810753704a3c3db81494249cbd5d629b6dd77e181192f9e20b59a953e |
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font_01_sfnt_off0000def0.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xDEF0 | 16876 bytes |
SHA-256: 4aa096b5f168e108a01fc9547408cf271f74f1728b1d0996a45a89b06b8f9ddb |
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font_02_sfnt_off00010ab2.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x10AB2 | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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