MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1204.002 Malicious Link
This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous embedded URLs point to compromised CMS uploads and disposable hosting, indicating a link farm designed to redirect users to malicious content. The document body is heavily obfuscated and appears to be non-readable content generated by wkhtmltopdf, further suggesting a malicious intent rather than legitimate document content.
Machine Learning
- Nyx PDF Classifier malicious score 0.9951
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://smidgel.ru/uplcv?utm_term=dysentery+water+borne+diseases
- https://mlbcsimleague.com/ckfinder/userfiles/files/9278837337.pdf
- http://etasystem.net/userfiles/files/punototav.pdf
- http://akvatoria.by/UserFiles/files/6831034159.pdf
- http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609bff2f994e9---19955371963.pdf
- http://derkwoo.com/upload/editor/files/manazifalejo.pdf
- http://educationexplosion.com/clients/a/aa/aae59ec6301d25964842a0067e0ae100/File/dujadoxirakor.pdf
- https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607ab9cbb475a---22878892192.pdf
- https://cls-toronto.com/wp-content/plugins/super-forms/uploads/php/files/770cf367cd65920e28891871a5076d22/57435485638.pdf
- http://hgbs.de/userfiles/file/65197273610.pdf
- https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607970a9ae81f---ritinilelu.pdf
- https://vieclambanhang247.com/upload/files/98877044407.pdf
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4d304491fe---52169346029.pdf
- http://huh.hu/UserFiles/File/fefubimegegawumevebuzug.pdf
- http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d2cbc6a5d9---42679504831.pdf
- https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/c2562ea23e9ca809edf6c1b5b40fa843/96776873549.pdf
- http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d8d09b9ba5d---35944423999.pdf
- http://pspectr.ru/userfiles/file/34812413910.pdf
- http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a86bf142d40---36621428503.pdf
- http://zaun-produzent.de/userfiles/file/30494045411.pdf
- https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/t95j0srlplmh6uh4c8g3co86j3/kavumozidu.pdf
- https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/160714116d0b53---jixafivabizadom.pdf
- http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a4d5404b627---68307726088.pdf
- http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e5991d7aa4---35238437647.pdf
- http://basaritarim.net/admin/editor_resim/file/61477062839.pdf
- http://anonelectronics.com/admin/fckeditor/editor/filemanager/connectors/php/upload_jpg/file/202105161747415160.pdf
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/xap/1.0/rights/
- http://dejavu.sourceforge.net
- http://dejavu.sourceforge.net/wiki/index.php/License
Extracted artifacts 3
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0000deb3.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xDEB3 | 16792 bytes |
font_01_sfnt_off0000f6c5.bin01e8217a605d65bbd63cb513dbf1e43542ead6a89c1ee6c6d790b22975c8b139 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF6C5 | 17304 bytes |
font_02_sfnt_off000123ec.bin133c45b3fcd13e182d4c3b8f835e75c9bdc0d73161120ab1d11e62cf4b5e97b0 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x123EC | 10536 bytes |
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