MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised WordPress sites, suggesting it functions as a link farm or redirection mechanism to phishing or malware hosting sites. The presence of multiple external URIs and the overall structure point towards a phishing or credential harvesting campaign.
Machine Learning
- Nyx PDF Classifier malicious score 0.9964
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=find+it+difficult+to
- http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/160763ac1c9847---vigonerix.pdf
- https://mama-light.net/business_school/uploads/file/dowajin.pdf
- http://yishiweb.com/upfiles/files/20210621_071257.pdf
- http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d6c6a603d8f---92393861328.pdf
- http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608fb1fb0eeb1---zosudojimemolegilunikeri.pdf
- http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/1609b692739f7c---66842198736.pdf
- http://dinskayarealty.ru/media/file/60114655391.pdf
- http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce0d5f0afbd---30096029001.pdf
- https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/c3372fa41550f9278e1f12beb4162a61/rilevaburosov.pdf
- https://geneticapanama.com/userfiles/file/91411619994.pdf
- http://dolphinegypt.net/userfiles/file/giked.pdf
- https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/8b38f6f6cb772ef6db1a5b74a0e397db/gazivinokatu.pdf
- https://alternativecarrepair.com/userfiles/file/18034307558.pdf
- http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/86ieqvg511mumjgo7u9r103mm1/kadaxikunorakuviri.pdf
- https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/5n58vdt69m7j0nunrushlsv6j7/dipabeselazuvoluta.pdf
- http://uniquecharacters.com/upload/files/xamobiboj.pdf
- http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074bda5e980d---67880906510.pdf
- http://www.weilandensemble.nl/ckfinder/userfiles/files/nofegaboperafijo.pdf
- http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/qlhucsffugl4sl2rm05avov1t4/texojewuxutifejut.pdf
- http://modero.vn/upload/files/nuniguk.pdf
- https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/0a2fdfca02d5eacf41c12d4435eabcf0/73971537060.pdf
- http://studiotecnicopetrillo.eu/userfiles/files/toxosupotuwozibogijab.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_off0000eb33.binb4a89040247d70b43c6d1c73eed76a3468b60d3187bb411c787d4bd5800b8944 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xEB33 | 9984 bytes |
font_01_sfnt_off00010158.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x10158 | 16792 bytes |
font_02_sfnt_off0001196a.bin7e8607a0967ec895e07793df7a3db4e69e8918ff25b53219aa71c5f52ee340e4 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x1196A | 16812 bytes |
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