MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with numerous embedded URLs pointing to compromised WordPress uploads and disposable hosting domains. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall structure suggests an attempt to redirect users to malicious sites.
Machine Learning
- Nyx PDF Classifier malicious score 0.9902
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://smidgel.ru/uplcv?utm_term=best+games+for+512mb+ram+android+phone PDF link annotation
- http://zuche0551.com/upload/file/lowarezofidamonidotaxo.pdfIn PDF document text
- https://khoahoc.timviec365.com/picturesfiles/xeketuketisanunoxilikanov.pdfIn PDF document text
- http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614fadd56a16d---33768745267.pdfIn PDF document text
- http://kurier48.pl/files/userfiles/file/51861975134.pdfIn PDF document text
- http://celcg.pl/uploaded/file/92339739538.pdfIn PDF document text
- http://serenetour.com/image/upload/File/beganitatutagipewo.pdfIn PDF document text
- https://mangonebike.com/uploads/file/72911803827.pdfIn PDF document text
- http://tangneylaw.com/admin/images/file/xinudupexose.pdfIn PDF document text
- http://swissies.lt/ckfinder/userfiles/files/joboxakukuvuwa.pdfIn PDF document text
- http://geerhannutpourreussir.be/docs/upload/files/reragepinizigupovonomefu.pdfIn PDF document text
- https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1614833e519303---voruzemaj.pdfIn PDF document text
- http://modulobase.com/userfiles/file/78492950224.pdfIn PDF document text
- https://kltccompany.com/ckfinder/userfiles/files/91218163111.pdfIn PDF document text
- https://cartolmania.it/file/58559207575.pdfIn PDF document text
- http://pxmonastery.org/CKEdit/upload/files/60747181657.pdfIn PDF document text
- https://livermore.com/wysiwygfiles/file/35409763156.pdfIn PDF document text
- http://veitali.com/upload/files/65422989917.pdfIn PDF document text
- https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142a5d5130ce---46823557961.pdfIn PDF document text
- http://unternehmensberatung-hegenbarth.com/userfiles/file/16276663028.pdfIn PDF document text
- https://kamhosting.nl/ckfinder/userfiles/files/pagedoxuzu.pdfIn PDF document text
- http://samocvet.org/foto/ck/files/fejefogemesufiwaniwom.pdfIn PDF document text
- http://himalayakebab.com/shipinc/userfiles/files/gomokuwovofoneto.pdfIn PDF document text
- http://ametansk.ru/uploads2/38501028406.pdfIn PDF document text
- http://ziva-muzika.cz/files/file/66448762244.pdfIn PDF document text
- http://xn--zb0by3yusal20ak5lcidnwigi.com/ckfinder/userfiles/files/1631233514.pdfIn PDF document text
- https://n-zvuk.ru/upload/file/69634454136.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_off0000b574.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xB574 | 16536 bytes |
SHA-256: 1fe97daef38af0b062c9b44fe1adf071bdc367f2eb95b0a85e455a0dfe9f4d52 |
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font_01_sfnt_off0000df23.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xDF23 | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_02_sfnt_off0000f73a.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF73A | 11396 bytes |
SHA-256: 9924087f312d8c2b07aa0ea0f2245a85dcd353c298b91dbc7ee24265e6c10307 |
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