MALICIOUS
164
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
This PDF file contains embedded JavaScript and numerous external URIs, many of which point to compromised or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' indicate a deliberate attempt to create a link farm for SEO manipulation or to host malicious content. The embedded JavaScript (PDF_JS) likely facilitates the redirection to these malicious URLs, contributing to a phishing or malware distribution attack. ClamAV detection further confirms its malicious nature.
Machine Learning
- Nyx PDF Classifier malicious score 0.9991
Heuristics 7
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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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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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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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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://oniceh.ru/uplcv?utm_term=oxford+english+grammar+course+advanced+with+answers+pdf PDF link annotation
- https://u-spot.biz/js/ckfinder/userfiles/files/lofedoniloz.pdfIn PDF document text
- http://zamaro.cz/images/fcke_files/file/firexejuniva.pdfIn PDF document text
- https://jakspravnenapsa.cz/userfiles/file/magotidi.pdfIn PDF document text
- https://incense888.com/uploads/files/202109080332175396.pdfIn PDF document text
- https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/68fm13tt9inpm79sog8aqf8dkq/34454543842.pdfIn PDF document text
- https://taiwan-tiaya.com/upload/tiaya_official/files/47198254961.pdfIn PDF document text
- https://pioneerlift.com/upfiles/editor/files/88085441813.pdfIn PDF document text
- http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/16146ff90273f2---fozasotidufuxalotur.pdfIn PDF document text
- https://xtremefitness.com.au/application/third_party/ckfinder/userfiles/files/91302214775.pdfIn PDF document text
- https://vyaspublicschool.com/ckfinder/userfiles/files/niromamepolimusawu.pdfIn PDF document text
- http://gomsuhoangminh.com/app/webroot/uploads/files/zomedikewafafipezufedaku.pdfIn PDF document text
- http://solarissoft.com/img/userfiles/files/87586332159.pdfIn PDF document text
- http://orenprom.com/img/account/file/85689600848.pdfIn PDF document text
- http://jcpingie.be/public/files/485130133.pdfIn PDF document text
- http://rulife.ru/ckfinder/userfiles/files/jikatofuf.pdfIn PDF document text
- https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1614388f44797e---2160124069.pdfIn PDF document text
- https://vnjhanoi.com/upload/files/xedawen.pdfIn PDF document text
- http://kimura-shihoshoshi.com/userfiles/file/kewawutofusepopafesewonan.pdfIn PDF document text
- https://grouptm2.com/contents/files/wunipavijug.pdfIn PDF document text
- http://alfavs.eu/userfiles/file/18578729689.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_off0000ae5b.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xAE5B | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_01_sfnt_off0000c66d.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xC66D | 14612 bytes |
SHA-256: b21fb29f2efe6adc6e9ac31dce8cff0eea55ba428e820a061726dca55b7b6295 |
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font_02_sfnt_off0000eb89.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xEB89 | 11444 bytes |
SHA-256: 16bdc55a1f4a7d4c6e5b1b4fbade4278e273edf5fe345977c8fb8e3a1327b4c3 |
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