MALICIOUS
142
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The sample is a PDF containing embedded JavaScript, which is a common technique for executing malicious code. The PDF also contains numerous external URIs hosted on disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious sites or download further payloads.
Machine Learning
- Nyx PDF Classifier malicious score 0.9975
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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Embedded JS stream low PDF_JSPDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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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://drafthe.ru/uplcv?utm_term=which+even+number+is+not+a+composite+number PDF link annotation
- https://dalycity.com/wysiwygfiles/file/nagatikukitutixovusurat.pdfIn PDF document text
- http://flashdisplay.net/UploadFiles/FCKeditor/20210905145505.pdfIn PDF document text
- https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/32d8f1e936cc858b0264c55fd04fdf21/75622803258.pdfIn PDF document text
- http://xn--80aa5alfu.kz/file/58443114546.pdfIn PDF document text
- http://ozdesignhouse.com/app/webroot/uploads/files/5453057490.pdfIn PDF document text
- https://nazragame.com/calisma2/files/uploads/36562944474.pdfIn PDF document text
- http://lawyersmarketingusa.com/user_upload_image/file/In PDF document text
- http://ksiclub.org/projects/achievemore/admin/upload/fckImages/file/16241964784.pdfIn PDF document text
- http://sibzakon.ru/ckfinder/userfiles/files/25699867972.pdfIn PDF document text
- http://technoauto.jp/js/upload/files/969103888.pdfIn PDF document text
- https://pcetravel.com/files/file/15599147987.pdfIn PDF document text
- https://ccskin.com/geektic/files/45998565770.pdfIn PDF document text
- http://pescepiana.eu/userfiles/files/16994695531.pdfIn PDF document text
- https://jcmimoveis.com/userfiles/file/92820093800.pdfIn PDF document text
- https://telliogluhukuk.com/userfiles/file/kenave.pdfIn PDF document text
- http://sakuragiramenandsushi.com/uploads/files/jumijizidisaladenoximiged.pdfIn PDF document text
- http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/1612f1333edeca---46077144187.pdfIn PDF document text
- https://navoloki.mebel18.com/uploads/files/tivubupivalikofupetexufam.pdfIn PDF document text
- http://facyt.com.ar/ckfinder/userfiles/files/tusumalonoze.pdfIn PDF document text
- http://luatsugiadinhviet.com/upload/ck/files/vonafijegazuvitas.pdfIn PDF document text
- http://firstcuwire.com/file_media/file_image/file/livexoxulumegu.pdfIn PDF document text
- http://goldenpeak.it/userfiles/files/weremazobiku.pdfIn PDF document text
- https://zakarpattya-tour.com/upload/9015547588.pdfIn PDF document text
- http://avanti.pl/userfiles/file/donagi.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_off0000d504.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xD504 | 10892 bytes |
SHA-256: 19d94aa5ba0928968fcf5926757fee5bb505bd094efecd23124ab01b1c8b22f3 |
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font_01_sfnt_off0000edd4.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xEDD4 | 17372 bytes |
SHA-256: 5cf9ef05a7e49906f8c889506c04cc0ea1d4f3faa7dfdaf09ccaf432051cf930 |
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font_02_sfnt_off00011b14.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x11B14 | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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