MALICIOUS
176
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple potentially compromised or disposable hosting sites. The presence of numerous embedded URLs, many pointing to user-uploaded content directories on various domains, strongly suggests a phishing or SEO poisoning campaign.
Machine Learning
- Nyx PDF Classifier malicious score 0.9961
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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QR-code redirect lure medium SE_QR_LUREDocument instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
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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 http://barexkft.hu/userfiles/file/33292356375.pdf
- http://essentielles-theater.de/UserFiles/File/rusudokiriruj.pdf
- https://artcorner-fiberglass.com/userfiles/files/79587202427.pdf
- http://krasneclanky.cz/uploads/33988045173.pdf
- https://shellserva.nl/docs/Image/file/54966745217.pdf
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137583cc1a04---37244115346.pdf
- http://greenflameenergy.com/userfiles/file/95629275631.pdf
- http://colorfusion.us/admin/images/file/jadinunozuviwizububebo.pdf
- https://intersensor.ro/v2011/Files/fck_upload/file/73163479087.pdf
- http://tractortools.cz/ckfinder/userfiles/files/pajawokalonenixezemuje.pdf
- https://botroul.be/uploads/36875477961.pdf
- http://twtime.com/uploads/files/202109030356082173.pdf
- https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131d695295cd---68627371053.pdf
- http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16138f6f8022ae---sosudogozimotubam.pdf
- http://tabletopad.com/images/file/70402079711.pdf
- http://zzzwchem.com/upload/files/visiniv.pdf
- http://psystems.gr/Administrator/uploads/userpics/OutPostImages/files/xagasazokejune.pdf
- https://godparents4tz.org/home/god/public_html/ckfinder/userfiles/files/wuzegajujixoden.pdf
- https://tselectromechanical.com/uploads/CKfiles/files/75367516241.pdf
- http://jtravel.clickis.kr/FileData/ckfinder/files/20210902_DBDB9C2A4D6B7CAC.pdf
- http://nicenpos.com/userData/board/file/17600504412.pdf
- https://nieruchomosciturystyczne.eu/files/file/zomazezovuzorevu.pdf
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=things+to+do+in+the+nether+minecraft
- 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_off0000f09e.bin763dc65c104be9fd8be3293edbdaed266131a581792520b3f1191e440431f110 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF09E | 17632 bytes |
font_01_sfnt_off00011eb0.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x11EB0 | 16792 bytes |
font_02_sfnt_off000136c7.bin754df7cbda1dd197c33a33882185d3d411e989cebf28b2fe5c39dbe732b2eb5a |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x136C7 | 10840 bytes |
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