MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised WordPress sites and potentially malicious URLs like https://coretry.ru/uplcv. The document body is heavily obfuscated and appears to be generated by wkhtmltopdf, suggesting it's not intended for human readability but rather to host these links.
Machine Learning
- Nyx PDF Classifier malicious score 0.9956
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://coretry.ru/uplcv?utm_term=semi+structured+focus+group
- http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b5550f5aa18---67912329950.pdf
- http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/fgkjic1iegn7j6bvk70tnuqmke/womuparavofedovizuti.pdf
- http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bccf5994276---pejovewo.pdf
- http://aircond.md/upload_fck/file/tomozigafajafu.pdf
- http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607774784dc5d---80952267736.pdf
- http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160cf8a0c6fd95---zeravirobevaxafuzosa.pdf
- https://alihuata.com/userfiles/file/zitom.pdf
- https://christianklein.eu/Quansis/ckfinder/userfiles/files/gavijiborixuz.pdf
- http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b041f96371---58340368471.pdf
- https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/abielumrd9m8m7l23d6jcb32iq/kesuzimozovoxotifinef.pdf
- http://ivepe-elearning.gr/assets/UserFiles/mainHome/file/waweduloj.pdf
- http://quangcaosms.org/media/ftp/file/20650929912.pdf
- http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a59b5c97a51---xawedinixim.pdf
- http://soluzionebenessere.eu/userfiles/files/bivuvovivavarokezid.pdf
- http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074d0f6d6fae---57579954848.pdf
- http://urbanconstructions.org/images/uploadedimages/file/leleruronipodaxabivep.pdf
- http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/ffmhp73vqc9vgtdscbqc2a7e84/13668144682.pdf
- https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/a53be8fad7b34e8a496fb80a12e9ec2a/jozufidomu.pdf
- https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160720a7b584af---34489142123.pdf
- https://peterdegendt.be/file/41908580080.pdf
- https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/1608348c1e0fc2---tuvumufekupekezawabuzemu.pdf
- https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/f5svqjh5pkco3kjj5t04jg77as/77574852059.pdf
- http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1609a98afd13e0---198429453.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_off0000eb07.bine57a2c93eb837a92205ed605810ab9ceb036019d0a2c4f8386ae07b54e69ac9b |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xEB07 | 16748 bytes |
font_01_sfnt_off0001161f.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x1161F | 16792 bytes |
font_02_sfnt_off00012e36.bind315e1e4e0ca22d0287a1a8fb09c4d151413dc93b47f8a1be11925bb49fc96c1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x12E36 | 10828 bytes |
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