MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to numerous external URLs, many of which are hosted on compromised or disposable domains. The presence of 'utm_term=best+docx+reader' suggests a lure to trick users into downloading a malicious file disguised as a document reader. No scripts were extracted, but the overall structure and URL distribution strongly suggest a phishing or malware distribution campaign.
Machine Learning
- Nyx PDF Classifier malicious score 0.9951
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://catamma.ru/uplcv?utm_term=best+docx+reader
- http://nhuaduongnhapkhauaz.org/upload/files/lijodub.pdf
- https://equinox-e.com/upload/UserFiles/file/40442847655.pdf
- http://ovartec.com/wp-content/plugins/formcraft/file-upload/server/content/files/161357d9676b40---69194985251.pdf
- http://oishisushigd.com/uploads/files/63020269900.pdf
- http://smenergy.kr/uploaded/file/6745853246139e30d684a1.pdf
- http://bikipvuikhoedep.com/app/webroot/files/editor_upload/files/20818343838.pdf
- http://ipceurope.eu/assets/file/26406858305.pdf
- http://euskararenginkana.eus/files/galeria/files/5575853815.pdf
- https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/34f56b033133796901b9e8879bdf351e/tiripazepoposo.pdf
- https://rakowka.pl/userfiles/file/81753545951.pdf
- https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613589bc0444f---fusuxikenaragara.pdf
- https://dcmheavyequipment.com/admin/images/file/nuwinupoposibezege.pdf
- http://ranch.pl/files/file/81685500049.pdf
- http://myepres.com/HotelEstimator/userfiles/file/87295618880.pdf
- http://rigdrilling.org/userfiles/file/22677612050.pdf
- http://sabaispa.net/userfiles/file/27263231646.pdf
- http://sns-russia.ru/userfiles/file/37111032448.pdf
- https://thietbixanh.net/uploads/files/99541236276.pdf
- http://1472bond.com/upload/Fckeditor/file/24936103201.pdf
- http://goksirkrupskimlyn.pl/img/upload/files/duvogemokugozizaxo.pdf
- http://businessnavigator.in/ckeditor/uploads/files/mixaroparazazufarezasa.pdf
- http://peetersinstallatietechniek.nl/upload/files/dodopuvumax.pdf
- https://reniuved.it/file/12592882541.pdf
- http://tiendanatacion.com/noticias/files/gikubuxeruvufeloxovoluvo.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_off0000b414.bin30499260da307aa468f69e4a92b89a7aa43e9d5a353b8644c648ff7007454891 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xB414 | 17488 bytes |
font_01_sfnt_off0000e138.bin1815d7a0cf07991819cc91691902f38fc707431745c320b9b213040f7a8f834a |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE138 | 10276 bytes |
font_02_sfnt_off0000f891.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF891 | 16792 bytes |
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