MALICIOUS
196
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm hosted on disposable domains, likely to obscure the true destination. The presence of a 'Password-protected archive handoff' heuristic suggests the document's purpose is to trick the user into downloading an encrypted archive, which is a common tactic to bypass gateway scanning.
Machine Learning
- Nyx PDF Classifier malicious score 0.9977
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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Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LUREDocument gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
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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=el+aprendizaje+colaborativo+en+el+aula+pdf
- https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16090f05461cab---83703671431.pdf
- http://koppeika.ru/userfiles/file/7602394741.pdf
- http://www.ville-dammarie.com/ckfinder/userfiles/files/76241341907.pdf
- http://carzip.biz/files/uploads/files/wedadubeponanizagedo.pdf
- http://influences-vegetales.eu/assets/Image//files/butazowasedilegezap.pdf
- https://drosamahetta.com/userfiles/file/2925720631.pdf
- http://teaneckhs1977.com/clients/67867/File/gefijorodoverag.pdf
- https://paperland.bg/uploads/file/79071316940.pdf
- http://hatowo.com/app/webroot/uploads/files/20581440845.pdf
- http://jiendurancecoaching.com/ckfinder/userfiles/files/498012506.pdf
- https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/ffdee844a31d4ff3e771c322f92482c4/xubeg.pdf
- http://xn--hy1bt45apoap01a.net/jangheung/userfiles/file/16134258931.pdf
- http://salon-urody-bellis.pl/images/file/fulifesesuzinajar.pdf
- https://ewastexperts.com/userfiles/files/35699815966.pdf
- http://remont-etalon.ru/upload/files/10045016862.pdf
- http://riggi.ru/userfiles/file/totigixibejubin.pdf
- https://bamfieldrental.com/userfiles/file/mixemitejuratokilurerawe.pdf
- http://vinag7furniture.com/app/webroot/files/editor_upload/files/88079644757.pdf
- https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607b1b906159c---85170922638.pdf
- http://superplasticizer.cn/d/files/60116239368.pdf
- http://thuexe7cho.vn/upload/files/setubiga.pdf
- https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8fda3ef8cf---88076450712.pdf
- http://php-lounge.de/userfiles/file/90521949436.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_off0000dac3.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xDAC3 | 16792 bytes |
font_01_sfnt_off0000f2da.binc4b47cc725ae82b4d4844a121a47f96d879213cce4c79ce41ba5d732e1248fcb |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF2DA | 10924 bytes |
font_02_sfnt_off00010bff.binc6d75600852d7f3da88b531839081cec416ff261a54ea128d38878fd78d23389 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x10BFF | 18072 bytes |
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