MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The sample is identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this attack pattern.
Machine Learning
- Nyx PDF Classifier malicious score 0.9981
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://infrive.ru/uplcv?utm_term=photoshop+elements+user+guide
- http://cosmosimpex.com/app/webroot/ckfinder/userfiles/files/62355331760.pdf
- http://kommunikator.nu/demo/userfiles/file///dubonutox.pdf
- http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/161469fd8ab266---57647317302.pdf
- http://espressobuilders.com/app/webroot/files/userfiles/files/85406154018.pdf
- https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/2f893340a02c7939de89eab6b174d68f/dajusuzibinonazuxavixew.pdf
- http://bon-mar.com/fck_user_files/file/kadusifexifepipewuninitet.pdf
- http://investbuild.ru/var/upload/file/wumozixifopojolujowatowa.pdf
- https://ka-base.no/images_content/file/82296223872.pdf
- http://keletunderground.hu/images/uploaded_pics/file/topipudixugajuvidalu.pdf
- http://parkingparts.com/Upfiles/file/37853537044.pdf
- http://hengtongrongshang.com/jingkelun/userfiles/files/20210906062122.pdf
- http://electriccityusa.com/images/fck_uploads/file/96667409737.pdf
- https://dursunguney.com/userfiles/files/21600023891.pdf
- http://jucal.es/images/file/66626860379.pdf
- https://itandem.net/ckfinder/userfiles/files/pumawusexi.pdf
- http://gpkoaee.ru/ckfinder/userfiles/files/tupeguwisinonusatobupeket.pdf
- https://shatalarab-llc.net/userfiles/files/56083310427.pdf
- https://khanikango.in/file/jojinapit.pdf
- http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/16138cfb707f6e---jonexozoxopovasekebim.pdf
- http://aaronandanthony.com/userfiles/files/42773832434.pdf
- https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/nvppf4dbc9hb5os4sdb7283ls3/67773305027.pdf
- https://dananeye.com/uploads/files/202109080819234395.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_off0000d1a7.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xD1A7 | 16792 bytes |
font_01_sfnt_off0000e9be.bind77c9f7f3e6a6455773437d8fd7df1de3864173bee13c09670808ec573de19e3 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE9BE | 10776 bytes |
font_02_sfnt_off0001021b.bin587ca4efef287d35fd79a22db4b05e73f4e430e753c65278348ace6d7eec7063 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x1021B | 17564 bytes |
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