MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous URLs pointing to compromised WordPress sites and other disposable hosting, suggesting a link farm designed to distribute malware or facilitate phishing. The presence of embedded URLs and the nature of the heuristics strongly suggest this document is part of a phishing campaign, likely delivered as a spearphishing attachment.
Machine Learning
- Nyx PDF Classifier malicious score 0.9951
Heuristics 6
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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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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://crysiq.ru/uplcv?utm_term=programs+in+c+by+reema+thareja+book+pdf+download PDF link annotation
- https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/076577a6da9fdca1a88be74fd2be2788/32121771765.pdfIn PDF document text
- http://jingluo.net/uploadfiles/files/netajakawozapiteboluf.pdfIn PDF document text
- http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ae81e0a9ad5---84012791373.pdfIn PDF document text
- https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ca3eec25be0---jizulotenifogib.pdfIn PDF document text
- https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/23f8c466ee5555fef73b9b44b2fbe7eb/95648090683.pdfIn PDF document text
- https://boumqueur-edition.com/upload/fckeditor/file/3519125582.pdfIn PDF document text
- http://csc0351.com/userfiles/file/20210629234405_zrn79f.pdfIn PDF document text
- https://zold-kommando.hu/files/66023668895.pdfIn PDF document text
- http://aksaaydinlatma.com/img/editor/image/file/47320810122.pdfIn PDF document text
- https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608727f1638c4---rewanuzetakinerigexu.pdfIn PDF document text
- http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/jdkb1528hva8tcopa24944aiq2/39083385788.pdfIn PDF document text
- https://vandolderskb.com/images/usr/neguboteligiroxefexo.pdfIn PDF document text
- http://davcpundri.com/css/file/65615522774.pdfIn PDF document text
- https://palcev.ru/userfiles/file/xefawowotisigavuzorigik.pdfIn PDF document text
- https://weddingitaly.jp/images/file/47002367288.pdfIn PDF document text
- https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/q4bii0a91mkje2qstfcq073cbf/pavasejom.pdfIn PDF document text
- https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/o4ch3jpu6bpbln1ck3s750uu73/34440043731.pdfIn PDF document text
- https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/7649d5b8175f6d0f7d3116779c389601/11347605803.pdfIn PDF document text
- https://myphi.biz/nbloom/fckuploads/file/zuxazoxokogelarake.pdfIn PDF document text
- https://presentkompaniet.com/img/content/file/39574888856.pdfIn PDF document text
- https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b27165fd27---nobujunesoweledo.pdfIn PDF document text
- http://mountcalvary76.com/clients/9/90/9062e1c9f2360b2cedac6e2854879500/File/96588214765.pdfIn PDF document text
- http://www.moyekolodin.com/files/829014717.pdfIn PDF document text
- http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160795e3090f67---48640482828.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_off0000ba58.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xBA58 | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_01_sfnt_off0000d26f.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xD26F | 11632 bytes |
SHA-256: 3270b692fd8b2b35322a1051f418deae1ca4b4f319d3cfa4f48a48406526d8ce |
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font_02_sfnt_off0000ed8b.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xED8B | 16692 bytes |
SHA-256: 0894042eb054ddd822ed742b989002c8085122eb14f70ba6a55e9dee2849bd8a |
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