MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1204.002 Malicious Link
The PDF contains numerous links pointing to other PDF files hosted on compromised CMS upload directories. Heuristics indicate this is a link farm designed to obscure the true destination, with a high ML classifier score and ClamAV detection confirming malicious intent. The primary attack pattern involves directing users to potentially malicious content via these links.
Machine Learning
- Nyx PDF Classifier malicious score 0.9989
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 http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16078f75c9face---xumijulowenidetagezalozu.pdf
- https://atcotourismtravel.com/userfiles/file/5167391174.pdf
- http://degrossier.nl/uploads/file/12526115689.pdf
- https://ceral.pl/ceral/pliki/file/vakowon.pdf
- http://xnucleus.com/members//member_images/files/bakuwefarixutokatojuvag.pdf
- https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/65e990403ef122ac93cbad56996a19f4/94512791062.pdf
- http://nhuaduongnhapkhauaz.info/upload/files/gofimifixowoboka.pdf
- http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160accff79f3d1---zoxan.pdf
- https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/d1a5ada0755d166cad3daa76472d06d4/mimotitojowevijojamiwalu.pdf
- http://augsburger-dartliga.de/uploads/file/84947454736.pdf
- http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/j638lqnosv9ocvidma8qi09fl0/zubema.pdf
- https://etonbio.com/newsLetters/images/file/jonunixuxifepev.pdf
- http://cjandjunemillerfarm.com/clients/75830/File/werovigep.pdf
- https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160c06813f18ee---jirogixuji.pdf
- http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160b05e0a03d9f---2716547510.pdf
- http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b74d8eb7854---30477449687.pdf
- http://impex-italia.it/userfiles/files/85986126596.pdf
- http://parentini.it/userfiles/files/87659723618.pdf
- http://ahcxdq.com/uploads/file/280231342801.pdf
- https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/b0225bc1579b6695ec66bebe82dae05c/suxutibaluvobifit.pdf
- http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/24c7af3b52e1e055853eb9c77c4053a9/50489734104.pdf
- http://anhuishangbiao.com/upload_fck/file/2021-4-29/20210429183552324919.pdf
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=long+list+of+square+numbers+up+to+100
- 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 4
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0000e889.bin325c5f5cda05429ae92d15c23118ca1b8712e485108c584e1e30b0ff615913b7 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE889 | 16084 bytes |
font_01_sfnt_off0000fdb6.binc750ad5c089a0429e56f24592cc2e95186fc50625a3210b1632f0b70b3d6f1b2 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xFDB6 | 11216 bytes |
font_02_sfnt_off0001177e.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x1177E | 16792 bytes |
font_03_sfnt_off00012f90.bindf5fffa89976a279172d3498e27600c5daba9ed075a2ff45029e44def774d116 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x12F90 | 17344 bytes |
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