MALICIOUS
164
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The PDF contains embedded JavaScript and multiple external URIs, many of which point to compromised CMS uploads or disposable hosting, forming a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The embedded JavaScript is likely used to facilitate the download or execution of a secondary payload.
Machine Learning
- Nyx PDF Classifier malicious score 0.9840
Heuristics 7
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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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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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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://queure.ru/uplcv?utm_term=cambridge+igcse+computer+science+coursebook
- http://bbfederico2.net/userfiles/file/75938798350.pdf
- http://mackyz7automotive.com/js/upload/files/pivagijelumava.pdf
- https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/06c45e4c9662921b3a97786276927cd3/14331743709.pdf
- http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/160f0ea497c3a3---55923640676.pdf
- https://led7.ru/file/25450619154.pdf
- https://goooinggroup.com/userfiles/files/20210626_070228.pdf
- https://smartcirclegroup.com/userfiles/file/tomisupopijutileviro.pdf
- https://fotoprint.lv/downloads/file/dadupizalekogotikopixu.pdf
- https://djennebeads.com/nbloom/fckuploads/file/jasojakegivuwewivap.pdf
- http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075d685a1aaf---22447235411.pdf
- https://clubforeducation.com/FCKeditor/userfiles/file/fufur.pdf
- http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160915b699cb27---19906763957.pdf
- http://aarogyamedico.com/userfiles/file/18061658083.pdf
- http://spzpoz-zdunskawola.pl/upload/file/piraduzebe.pdf
- http://dolphinegypt.net/userfiles/file/17206889719.pdf
- https://psychotherapie-coeppicus.ch/userfiles/files/7625207223.pdf
- https://chetanaus.org/bheru/uploadfiles/file/41570877727.pdf
- http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16077d4efef782---wozota.pdf
- https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/b87sdeg9sf1ot43r45dq5c98p3/tipelijuwuma.pdf
- https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1aa19b79a0---lokisiwamogoxafaloxavej.pdf
- http://dlt-nkp.com/fileupload//file/tofinosojotap.pdf
- http://www.sas.edu.mn/ckfinder/userfiles/files/tepalijipajekizuka.pdf
- http://sanruou.com/app/webroot/uploads/files/20152563058.pdf
- http://amandamaitland.com/images/file/51698598095.pdf
- https://digitaldaya.com/imagenes/file/debopepisapevozu.pdf
- http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160870ae661fc6---pokokuvex.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_off0000c585.binfcac61d5ea320a63098c83f5f09c53dca5b895ba40933e2669707d906367391d |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xC585 | 11172 bytes |
font_01_sfnt_off0000df41.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xDF41 | 16792 bytes |
font_02_sfnt_off0000f753.bin5f90f643dd58bc024c5b1352a4f41f8682f7f1283ae6df5fd94bcaefdb1fd260 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF753 | 17412 bytes |
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