MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.007 JavaScript
The PDF contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting a link farm designed for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains text related to a 'thank you letter to boss', likely a lure to encourage users to click the embedded links.
Machine Learning
- Nyx PDF Classifier malicious score 0.9998
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://philabc.ru/uplcv?utm_term=thank+you+letter+to+boss+on+last+day+of+work PDF link annotation
- https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/ks785ig82b56tcfa4lagoorvt4/35119310628.pdfIn PDF document text
- https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a9aed67df36---12552424289.pdfIn PDF document text
- https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/krl6c2oko15o47fvp90orph4nu/1516314979.pdfIn PDF document text
- https://bilbox.es/wp-content/plugins/super-forms/uploads/php/files/2fa7d8ca94c9fb78be39eeb58f1a6a6c/rewaxewupotiki.pdfIn PDF document text
- http://littlepearlbooks.in/data/eimages/file/89780588750.pdfIn PDF document text
- https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606ecbbd5dae2---wuxexen.pdfIn PDF document text
- http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160a6cfce93afa---29215001734.pdfIn PDF document text
- http://hondatayho.top/img-ngocbao/files/88738606262.pdfIn PDF document text
- https://chaplains-camps.org/upload_picture/file/zebutuj.pdfIn PDF document text
- http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/75a1d1d1aa7ffc4ce3d0477c32914cd2/texepogadaboluxed.pdfIn PDF document text
- https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/9ce5524447117967e9c0c84706157577/49671016889.pdfIn PDF document text
- https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/16081cd59e0c18---81125463645.pdfIn PDF document text
- https://sambelteri.com/contents//files/18950817435.pdfIn PDF document text
- http://brooklynsmokeshops.com/admin/images/file/gogevopejobozujobebajil.pdfIn PDF document text
- https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/160a1ebdf37c0d---37440879182.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text
Extracted artifacts 2
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0000e9c0.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE9C0 | 5340 bytes |
SHA-256: b73a89016d2b34e21ccc404bb465ebbc8900645c9fa4d08925fecc88add59d00 |
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font_01_sfnt_off0000fbf9.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xFBF9 | 11164 bytes |
SHA-256: fc654732e1331e06cb5bff7bf7afa937944fb8e7d17fc14b27f69181e1912787 |
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