MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1204.002 Malicious Link
The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous embedded URLs, many pointing to compromised CMS uploads and disposable hosting, indicate a link farm designed to redirect users to malicious content. The document body is heavily obfuscated and unreadable, suggesting an attempt to hide its true purpose.
Machine Learning
- Nyx PDF Classifier malicious score 0.9981
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://coretry.ru/uplcv?utm_term=rassenkunde+und+rassengeschichte+der+menschheit+pdf PDF link annotation
- http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098441d5085e---88826814713.pdfIn PDF document text
- http://ubest.ru/images/file/30813590204.pdfIn PDF document text
- https://mrmobilewebsite.agency/wp-content/plugins/super-forms/uploads/php/files/5c035b5bb2e071ad4ee54a1e7a2e65dd/83201909252.pdfIn PDF document text
- https://www.psk.com.au/application/third_party/ckfinder/userfiles/files/32215638176.pdfIn PDF document text
- https://kawanmto.info/contents//files/67080016156.pdfIn PDF document text
- http://innovad-ltd.com/userfiles/file/29281908051.pdfIn PDF document text
- http://greenld.com/userfiles/bitodirutevuw.pdfIn PDF document text
- https://hoakhanh.vn/uploads/image/files/9258609995.pdfIn PDF document text
- http://hieuchuan.com/upload/files/ketikenimodebu.pdfIn PDF document text
- https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/d230bc5c3010a21ee224b76f81524dd5/28992615978.pdfIn PDF document text
- http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606eab08d7906---tebom.pdfIn PDF document text
- https://www.hotwaterfactory.com.au/wp-content/plugins/super-forms/uploads/php/files/8634e92dd270ff2e4a3d5040167e5629/86534393845.pdfIn PDF document text
- https://tramhuonghanoi.vn/upload/files/rokoxakomupef.pdfIn PDF document text
- http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/tmf766mr1fisqosee3mftlpnu9/64753559102.pdfIn PDF document text
- http://gnatowski.pl/attachments/file/ribopadokoganaxiru.pdfIn PDF document text
- http://jandenzobv.com/image_uploads/file/60368795244.pdfIn PDF document text
- https://raiporjai.com/piceditor/file/58177573738.pdfIn PDF document text
- http://arci-mp.fr/admin/File/mumoroje.pdfIn PDF document text
- http://tksvolga.ru/userfiles/file/96682239412.pdfIn PDF document text
- http://pensionpoint.cz/userfiles/files/xexemudaposofan.pdfIn PDF document text
- http://thailaundry.com/imgUpload/files/62282300712.pdfIn PDF document text
- http://eclickapps.in/userfiles/files/61306470069.pdfIn PDF document text
- 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_off0000d2b4.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xD2B4 | 11136 bytes |
SHA-256: 748d7506de4709e17889007390e4ecb3f71316d76773c1cfb66c4bec5913964e |
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font_01_sfnt_off0000ec58.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xEC58 | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_02_sfnt_off0001046a.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x1046A | 19100 bytes |
SHA-256: 5f22bf65df87d310a6f086154e892643667340704d07a9be58dfa3ceb5dbf9ad |
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