MALICIOUS
134
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The sample is a PDF file detected as malicious by ClamAV. It contains embedded JavaScript, which is likely used to redirect the user to external URLs. Several heuristics indicate the PDF acts as a link farm, pointing to compromised WordPress sites and disposable hosting, suggesting a phishing or malware distribution scheme. The embedded JavaScript is the primary mechanism for achieving this redirection.
Machine Learning
- Nyx PDF Classifier suspicious score 0.2548
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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PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILEDThe cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
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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 http://lobanowscy.pl/userfiles/file/3015663976.pdf In PDF document text
- http://divapharma.com/uploaded/file/vofadanabumebene.pdfIn PDF document text
- https://perfecthospitals.org/ckfinder/userfiles/files/wasaletoninagilanuz.pdfIn PDF document text
- https://ontogepszerviz.hu/editor_up/67930982715.pdfIn PDF document text
- https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613bdc8bde936---92422890534.pdfIn PDF document text
- https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/b8f4675b13eebb7aca3dc1045a42d38a/37777516139.pdfIn PDF document text
- https://lesura.net/userfiles/file/78216136169.pdfIn PDF document text
- https://romalasergroup.com/userfiles/files/zumunufezufutesizunodesi.pdfIn PDF document text
- http://hillsdalehorseboarding.com/ckfinder/userfiles/files/46189890390.pdfIn PDF document text
- https://aksusu.com/upload/files/25501330863.pdfIn PDF document text
- http://chugguwang.com/files/fckeditor/file/55100626476.pdfIn PDF document text
- https://rimsball.com/ckfinder/userfiles/files/doxejedunabakasezewolevat.pdfIn PDF document text
- https://asiapharma.la/files/files/fetikigevakuzujeb.pdfIn PDF document text
- https://bokaichenyu.com/upload/files/55132857862.pdfIn PDF document text
- http://hwayinn.com/image/files/20210906_222627.pdfIn PDF document text
- http://civicwomen.com/ckfiles/files/gitorapaf.pdfIn PDF document text
- http://www.prctech-th.com/ckfinder/userfiles/files/jufamaguvirasajig.pdfIn PDF document text
- https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/m6g3lr35eftu5hfif6ji3hlpfo/72338576078.pdfIn PDF document text
- http://plusk-car.com/js/upload/files/xomopekilin.pdfIn PDF document text
- http://trunglam.vn/uploads/userfiles/file/13340339214.pdfIn PDF document text
- https://fengshan-zhennangong.org/upload/ckfinder/files/23388513707.pdfIn PDF document text
- http://www.maderas-navarro.com/ckfinder/userfiles/files/41697643862.pdfIn PDF document text
- http://www.tobywells.org/media/fckdir/file/bilon.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=date+format+in+androidPDF link annotation
- 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_off0000df88.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xDF88 | 18012 bytes |
SHA-256: 832ef25cb0de230d4f0de9efb09540ce8ff35c63cd869fddce9bfe466a833be0 |
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font_01_sfnt_off00010ebd.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x10EBD | 10300 bytes |
SHA-256: d8706d89342f6e1a05b1035ce5d98c2eccf07fa31c1a82b732f5f9d43c742f4c |
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font_02_sfnt_off000125ec.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x125EC | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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