MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains numerous embedded URLs that form a link farm, with several pointing to compromised CMS upload storage. The primary URL, 'https://coretry.ru/uplcv?utm_term=free+instagram+followers+increase+app', suggests a lure related to social media engagement, likely to trick users into visiting malicious sites.
Machine Learning
- Nyx PDF Classifier malicious score 0.9965
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://coretry.ru/uplcv?utm_term=free+instagram+followers+increase+app PDF link annotation
- https://www.kiemtoandongnghi.com/public/plugins/ckfinder/userfiles/files/76374160737.pdfIn PDF document text
- http://www.gc-antey.ru/ckfinder/userfiles/files/pilujiduj.pdfIn PDF document text
- http://jucal.es/images/file/77234669008.pdfIn PDF document text
- http://vattucongtrinh.com/userfiles/file/74299573167.pdfIn PDF document text
- https://olamare.com/img/uploaded/file/68295851870.pdfIn PDF document text
- http://artediapharma.com/upload/files/75195319795.pdfIn PDF document text
- http://residencecarlofelice.com/userfiles/files/99434354982.pdfIn PDF document text
- http://tsrmvolontari.it/userfiles/files/35512258041.pdfIn PDF document text
- http://elencostruzioni.it/userfiles/files/83888605238.pdfIn PDF document text
- https://fidelishospice.com/ckfinder/userfiles/files/3609080472.pdfIn PDF document text
- https://amthanhanhsangchinhhang.vn/upload/files/raxejadi.pdfIn PDF document text
- http://skonasystems.com/userfiles/file/89708634431.pdfIn PDF document text
- http://yacpa.org/yacpafiles/file/92679970786.pdfIn PDF document text
- https://vinacomvietnam.vn/uploads/news_file/4444009289.pdfIn PDF document text
- http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/86d34cd59f66d4024e32853009785d0b/pepopupilugibiri.pdfIn PDF document text
- http://ahzycw.com/upload_fck/file/2021-9-1/20210901221754279618.pdfIn PDF document text
- https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/161384e5db52e1---torigo.pdfIn PDF document text
- http://webmba.fr/client/logo/file/zesedatedelew.pdfIn PDF document text
- http://korea-seals.com/ckfinder/userfiles/files/2065263521.pdfIn PDF document text
- http://fine-trading-knotwork.de/uploads/media/nixexikezeleb.pdfIn PDF document text
- http://thienthaopc.com/upload/FCK/file/17627700031.pdfIn PDF document text
- https://vietnamwelder.vn/uploads/news_file/30317333444.pdfIn PDF document text
- http://tractortools.cz/ckfinder/userfiles/files/nuxafexuredizopix.pdfIn PDF document text
- https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/0085e092019a4aee4513f4d885aee538/91451389026.pdfIn PDF document text
- http://geoass.eu/userfiles/files/33453661923.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_off00011019.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x11019 | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_01_sfnt_off00012830.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x12830 | 10888 bytes |
SHA-256: db73cb37f909ace3455e07d53637dda87c180a03ff7e0e7d17465111cbd55dfb |
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font_02_sfnt_off0001416f.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x1416F | 18544 bytes |
SHA-256: fc7f7ab5c02a88b2e8e249b2ed5d56641c13c3c63a32c84c0209192bc73a08e3 |
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