MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, many hosted on compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the PDF structure point towards a phishing or malware distribution campaign, likely initiated via spearphishing attachment.
Machine Learning
- Nyx PDF Classifier malicious score 0.9942
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://chcial.ru/uplcv?utm_term=list+the+general+functions+of+the+cerebrum
- https://isleo.com/i_photos/file/boduxizugimivafugesapizu.pdf
- http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dea6334f56---larilumujakewelunofamutev.pdf
- https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/84fa02fae8b91eb14c5c9e932e1c567b/zutizobizimuvuvikevo.pdf
- https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/28qarui22kj3pclnt9kar2thb2/fowomulozirenodewuruteta.pdf
- http://aceonlinementors.com/userfiles/file/35158339925.pdf
- https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/3d316284cc7a29f2172f31e04ac4e347/99114504995.pdf
- https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/96423b08b747d3f74fc2f66e610db648/wajifo.pdf
- https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/7884a59927ee7a42f97c3d390c92280d/5452757634.pdf
- http://copelandreunionla.com/clients/6/66/66f6f3de7053633686652f51c4c00696/File/ribewesawezi.pdf
- http://wijnhuis-vaessen.nl/site/data/ws/files/gamerazimemelopekowu.pdf
- https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160789de06120c---zivusuvomoxukupenatom.pdf
- http://adaviestransportltd.com/userfiles/file/bojilamusozilib.pdf
- http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16090ffe285b91---97359481452.pdf
- https://dolcezzecaffe.it/file/35641203814.pdf
- https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/1608ef6a5e54d8---64225819847.pdf
- http://esthebel.de/userfiles/file/sofuk.pdf
- https://www.northwoodmedical.ca/wp-content/plugins/super-forms/uploads/php/files/92o6r9i6vth1dgtf2fofdc0039/depizuzokasaf.pdf
- http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089c7bc7674b---90022221971.pdf
- http://myshopekerala.com/userfiles/file/20070938088.pdf
- http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ad6515c2bb2---kitusuxa.pdf
- http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160892cd0d99e5---94343167456.pdf
- https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/1608bee8735581---vekunufotatikamegavufowu.pdf
- https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/hufaf3j4u44ror4teq9p7odiaa/lurop.pdf
- https://singaporenotarypublic.com/wp-content/plugins/super-forms/uploads/php/files/666bf23d3c0b1e91f56177014a6c372c/wonedevaxowofa.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_off00010445.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x10445 | 16792 bytes |
font_01_sfnt_off00011c5c.bin18853bd7eafdf63e262029ff4b8292509c1ca0229c6585e7f104c264427d6467 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x11C5C | 10980 bytes |
font_02_sfnt_off000135a6.bin60096ebef787711249a50590c2141df4361ea3d1e79f53a421e1142b0cd32ece |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x135A6 | 16900 bytes |
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