MALICIOUS
164
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The sample was detected as malicious by ClamAV and a machine learning classifier, indicating a high likelihood of malicious intent. The presence of embedded JavaScript and a large number of external links, many hosted on compromised or disposable domains, suggests this PDF is designed to redirect users to malicious websites or download further payloads. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically points to a link farm strategy, often used for SEO poisoning or phishing.
Machine Learning
- Nyx PDF Classifier malicious score 0.9978
Heuristics 7
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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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Embedded JS stream low PDF_JSPDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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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://garglob.ru/uplcv?utm_term=chemical+equation+for+respiration+in+humans
- http://compsult.net/userfiles/file/74876084855.pdf
- https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/951aa05e399f72877af3e0acd68d8021/simit.pdf
- https://medbillings.us/lightspeedweb1/file/fevinoserajif.pdf
- http://ameshamagazine.com/js/upload/files/64016129129.pdf
- https://mannerfeltdesignteam.se/ckfinder/userfiles/files/vumojajezixeruxuk.pdf
- https://monyetmesum.com/contents/files/xatawojonerovizi.pdf
- http://nhagiatxanh.com/public/default/ckeditor/files/50631636718.pdf
- http://china-hold.com/UploadFile/file/20210908124643584.pdf
- http://sharon-barron.com/userfiles/files/98257734807.pdf
- http://nhatngungoisaoxanh.com/upload/files/dijepibuvewovogeweto.pdf
- http://ldkxzzs.com/images/userfiles/file/2471440029.pdf
- http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/161365cdd46a92---75154192972.pdf
- http://cx-gl.hu/images/files/66848784034.pdf
- http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1613158edd3cf1---ronidasewem.pdf
- http://jobsandhi.com/uploaded_files/userfiles/files/mabum.pdf
- http://z500.si/files/26985261655.pdf
- https://maviet.vn/upload/files/66017355577.pdf
- http://studiocariola.com/userfiles/files/12441261227.pdf
- https://parklanehotel.asia/userfiles/file/38255250696.pdf
- https://tenekedjieva.com/uploads/file/wisovusoli.pdf
- http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/161362cae524b8---69775108922.pdf
- https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/b8051c4bf57c8f644f9d27e6afacc024/75350611779.pdf
- http://castrolmintabolt.hu/images/upload/file/64059113390.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_off0000b7ff.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xB7FF | 16792 bytes |
font_01_sfnt_off0000d011.bin9610c3dd6d5acac15834d7eb353ae764290a70c375a41a8f491ed12b2ce9c62a |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xD011 | 15748 bytes |
font_02_sfnt_off0000f7e8.bin48ba9b3ef916a8ef2ff7ac7dac3f5427aa31316b7b7580da3b02b18c175ed2fd |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF7E8 | 11020 bytes |
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