MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, directing users to multiple external URLs, some hosted on compromised WordPress sites. The presence of numerous PDF links on disposable hosting further supports a phishing or malware distribution scheme.
Machine Learning
- Nyx PDF Classifier malicious score 0.9958
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://synerhu.ru/uplcv?utm_term=pure+physics+book+pdf PDF link annotation
- http://memsports.com.br/admin/libs/ckeditor/ckfinder/files/bikedujiwefevimodivapuba.pdfIn PDF document text
- https://inprovitperu.com/ckfinder/userfiles/files/baxifiv.pdfIn PDF document text
- http://shukokai-voves.fr/userfiles/file/74426167689.pdfIn PDF document text
- https://e-uchebnici.com/img/file/rajibofen.pdfIn PDF document text
- https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1612ee32abd803---43950759515.pdfIn PDF document text
- http://biolabsrl.org/userfiles/files/4332902599.pdfIn PDF document text
- http://hichipper.com/hichipper/uploadfile/file/2021090308075173499.pdfIn PDF document text
- https://ssvacancy.com/ckfinder/userfiles/files/30622229566.pdfIn PDF document text
- https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/ac0c8a55c294143c55b8d7ccca80aa5f/5922747192.pdfIn PDF document text
- http://mtt-association.fr/upload/file/2598401050.pdfIn PDF document text
- https://macroedunet.com/userfiles/file/64200531614.pdfIn PDF document text
- https://netshopnepal.com/userfiles/file/24683344151.pdfIn PDF document text
- http://timnhanhonline.vn/upload/files/3828329623.pdfIn PDF document text
- http://www.leposeur.fr/site/upload/ckfinder/files/24769081396.pdfIn PDF document text
- https://turkeyinsurance.info/images/file/73700990049.pdfIn PDF document text
- http://babijie.com/upload_fck/file/2021-9-10/20210910163633591142.pdfIn PDF document text
- https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/c0a14616c190a87e79b9d527906df288/pukositabigi.pdfIn PDF document text
- https://lompatjauh.com/contents/files/77014133469.pdfIn PDF document text
- https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/4tbt71md3redvt4dvsfa0cbpph/80627739844.pdfIn PDF document text
- http://umartravel.com/files/kifufevedodozekevexukole.pdfIn PDF document text
- https://metrosecuritynepal.com/assets/userfiles/files/9251800631.pdfIn PDF document text
- http://d2dgroup.net/upload/files/rizobunakopidopoxo.pdfIn PDF document text
- http://csc0731.com/userfiles/file/20210910070353_c2iy2g.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_off0000d180.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xD180 | 16828 bytes |
SHA-256: aa4d652a9498e97db6e7ee6b9cc4259c74d4e4033a9f5653047a41a0dab678df |
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font_01_sfnt_off0000fce6.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xFCE6 | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_02_sfnt_off000114fd.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x114FD | 10752 bytes |
SHA-256: 06607021f847230141aa970f4122a4ab78e2463ef861cf93ceda253372dce171 |
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