MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The sample is a PDF file flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous embedded URLs, many of which point to compromised CMS upload storage or are part of a link farm on disposable hosting, suggesting an attempt to distribute or obscure malicious content. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a non-clustered link farm on disposable hosting, and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM suggests compromised WordPress sites are being used to host files. The presence of external URIs and the overall structure point towards a malicious document, likely delivered via spearphishing.
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://gulfcans.com/home/madarmun/public_html/gulfcans/images/bulk_images/files/12424378433.pdf
- http://www.anjhimayath.com/upload/file/62332372556.pdf
- https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/9c52d8e974f76680af6f82dae518befe/zixalajutebivopokanokera.pdf
- https://salonrewards.ca/images/file/78671542194.pdf
- https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/ae94fb64a5222cdffbb9ab97a1e212fa/nigelamepajatet.pdf
- http://maimungkorn.com/UserFiles/file/puwonurazukikoroxajuv.pdf
- http://restaurant-lyons.fr/userfiles/file/89103632961.pdf
- http://reklama-v-sochi.com/ckfinder/userfiles/files/xutoguzurudakisajiruwem.pdf
- http://wrtour.com/FileData/ckfinder/files/20210917_37C0836FC15D5F4D.pdf
- http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1614e0972962cc---wumugo.pdf
- http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614c47bd24ae0---73801403592.pdf
- https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/k191ja33e23smqpquuiqiiulme/35631339892.pdf
- http://oipipleszno.pl/userfiles/file/97169994276.pdf
- http://sinoorchids.com/image/file/22672621062.pdf
- http://mirutte.com/newsfiles/files/dirilezivezerefofoperirak.pdf
- http://talleresjpg.es/img/file/41662614568.pdf
- http://vektor-bezpeki.com/userfiles/files/4111117436.pdf
- http://nutrizionisti.eu/public/thread/risorse/file/xexepoz.pdf
- http://itagqatar.zajeltel.com/itag/file/files/mopabugepisujomedezizil.pdf
- http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/7vq8t0meaa89u4edvfc5dbfo32/tepatavosepopamuzibam.pdf
- https://www.utn.ac.cr/sites/default/files/files/sukagerofarojikewefegur.pdf
- https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/1614cdd329d4df---14197217341.pdf
- http://avalon-essenzen.at/userfiles/file/ruxebifodorapowolusa.pdf
- http://verzorgingsindex.nl/images/uploads/17991788146.pdf
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=baixar+jogos+gba+android
- 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_off0000b042.bin4f957f4ed1881b86d041c59012f40277c5796ebf4701ba325b9a249412912f3f |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xB042 | 10572 bytes |
font_01_sfnt_off0000c83b.binc77c6fbd2ced12620011dc7e87133fcf0690cc984deb4e6cea769481f0753cca |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xC83B | 14796 bytes |
font_02_sfnt_off0000ede8.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xEDE8 | 16792 bytes |
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