MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
This PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs that point to compromised CMS upload directories. These links likely serve as lures for phishing attacks or to distribute further malicious payloads.
Machine Learning
- Nyx PDF Classifier malicious score 0.9985
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 http://anhuishangbiao.com/upload_fck/file/2021-4-29/20210429080213187907.pdf In PDF document text
- https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/53c11686c14ebb3a70fc2655f3030306/mugujutesobaribowifu.pdfIn PDF document text
- https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/1bbb130e7fa58e5136ffdb35e833f989/31391202506.pdfIn PDF document text
- https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8a690d47f---vakafatibelugapaga.pdfIn PDF document text
- https://omnistopbollards.com/application/third_party/ckfinder/userfiles/files/potigovek.pdfIn PDF document text
- https://mariellatriolo.it/public/file/lisezotuwexonixominijan.pdfIn PDF document text
- https://ascinfratech.com/clientprojects/trading/file/madixefugedelopizuf.pdfIn PDF document text
- http://chanhungcorp.com/images/uploads/files/tinebabolipizesokid.pdfIn PDF document text
- http://dush-kz.ru/uploads/fck/file/vukusazusajure.pdfIn PDF document text
- https://quangcaowebsite.vn/uploads/files/18396575146.pdfIn PDF document text
- http://www.workbythai.com/admin/assets/images/50767666845.pdfIn PDF document text
- https://msr-hudsonproperties.com/wp-content/plugins/super-forms/uploads/php/files/c55b4de0159ce13221356557dc9151d0/pudabef.pdfIn PDF document text
- https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/06oe1jjlqpkb5h47sogtt3tq1j/41459049678.pdfIn PDF document text
- https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1606d1cdd43cbd---tobazogexob.pdfIn PDF document text
- http://dental-forum.ru/userfiles/file/76766801865.pdfIn PDF document text
- http://rdmsrl.it/userfiles/files/40669323448.pdfIn PDF document text
- http://markone-tools.com/upload/files/serezoxowuwibara.pdfIn PDF document text
- http://ehoron21.mn/uploads/files/kudulapuluw.pdfIn PDF document text
- http://khiconghoixuancong.com/Khicong/admin/userfiles/file/832100716.pdfIn PDF document text
- http://goksirlambinowice.pl/img/upload/files/vesoraz.pdfIn PDF document text
- http://55thocscompany.com/clients/62662/File/29678109428.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=antiemeticos+en+obstetricia+pdfPDF link annotation
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
Extracted artifacts 3
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0000c0cb.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xC0CB | 18560 bytes |
SHA-256: 5a850224e4a670a91ab18db5f5c6257d3a425329b3da72e67641dc56629d37d0 |
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font_01_sfnt_off0000f055.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF055 | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_02_sfnt_off0001086c.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x1086C | 10856 bytes |
SHA-256: 5ae1e6ce475b4bddc4db40c42fbb86e1376962a6a3aaefcaf158130aef35c5f1 |
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