MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Numerous heuristics point to the PDF being a link farm, with many URLs hosted on disposable or compromised domains, suggesting a phishing or malware distribution scheme. The 'wkhtmltopdf' authoring application and the presence of embedded PDF objects are common in such campaigns.
Machine Learning
- Nyx PDF Classifier malicious score 0.9964
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://cructi.ru/uplcv?utm_term=lord+of+the+flies+ebook+download PDF link annotation
- http://decaiyun.com/upload/file/210906025842077793igabct45f294.pdfIn PDF document text
- https://autopits-directo.migrupoq.com/ckfinder/userfiles/files/xevatax.pdfIn PDF document text
- http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1613c370dd4134---94971597158.pdfIn PDF document text
- https://treasurehunterdetectors.com/ckfinder/userfiles/files/65519012138.pdfIn PDF document text
- http://daeryuhealthcare.com/ckupload/files/53418722155.pdfIn PDF document text
- http://iccjsc.vn/images/uploads/files/wigox.pdfIn PDF document text
- http://ayurveda-shiatsu-nice.com/upload/files/weneduwedenewix.pdfIn PDF document text
- http://henskeschildersbedrijf.nl/upload/jotanujujixijitafogavovix.pdfIn PDF document text
- https://cyberbirddog.com/userfiles/files/fexubizenel.pdfIn PDF document text
- https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614226147f49f.pdfIn PDF document text
- http://cloverdiamond.com/file/repop.pdfIn PDF document text
- http://metisentry.net/ckfinder/userfiles/files/jadod.pdfIn PDF document text
- http://sm300159.agchost.com/userfiles/files/5672336872.pdfIn PDF document text
- http://cuacuonanbinh.com/userfiles/file/97446692110.pdfIn PDF document text
- https://marblobaths.ph/app/webroot/img/files/porolugajapinukes.pdfIn PDF document text
- https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/4ff4cc969b5a5e50acc810491fb8ddad/47162818257.pdfIn PDF document text
- http://lamorenj.com/userfiles/files/buxukusedomimosipalo.pdfIn PDF document text
- https://propiedades.net/ckfinder/userfiles/files/14647627879.pdfIn PDF document text
- http://dezis.ru/uploads/files/wuvemimorabet.pdfIn PDF document text
- http://ominocoibaffi.it/userfiles/files/vekerekinuvamodazob.pdfIn PDF document text
- https://www.koreayokogawa.com/ckfinder/userfiles/files/sorabo.pdfIn PDF document text
- http://ytbozhuo.com/upload/file/20103614808.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_off0000dc9b.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xDC9B | 17928 bytes |
SHA-256: b3b17082e55dad2d26747eeaa30bdb9fec4e01122f68eda3090b12be2c08b214 |
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font_01_sfnt_off00010ae7.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x10AE7 | 10728 bytes |
SHA-256: 41eb3b96cb9ccf64f68fc06c8ab78291707ad326a18a8f8c6daabae476068a5c |
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font_02_sfnt_off00012387.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x12387 | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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