MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. Heuristics identified the document as a link farm, with multiple embedded URLs pointing to various domains, some of which are hosted on compromised CMS uploads. The primary purpose appears to be redirecting users through a chain of links, likely to a phishing page or to download a secondary payload.
Machine Learning
- Nyx PDF Classifier malicious score 0.9988
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 http://barudan.hk/UploadFile/file/20210612135623179.pdf In PDF document text
- http://thietbiotoviet.com/Images_upload/files/79900242732.pdfIn PDF document text
- http://abogarestudio.com/userfiles/file/22523547257.pdfIn PDF document text
- http://abwhopewell.com/uploads/files/5623769838.pdfIn PDF document text
- http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae8b687d3f9---52835545635.pdfIn PDF document text
- http://carefirstwalkathon.com/clients/8/89/89514deb4c0e8807eb046cac28c4977f/File/2328811395.pdfIn PDF document text
- https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/v0s88cmfvmdo51oefgim706p4h/bipuwexajige.pdfIn PDF document text
- https://unicon-msk.ru/data/files/55269832735.pdfIn PDF document text
- https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/22db3055a56eeece4b8077d9e9e05f88/miwaruzewevefudurez.pdfIn PDF document text
- https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608605ff4b66c---3933248248.pdfIn PDF document text
- http://aj-freight.com/ckfinder/userfiles/files/5053605745.pdfIn PDF document text
- https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/j48ici01k8slesa3akspk9ja00/29066444822.pdfIn PDF document text
- https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1611ca4b42c055---tofup.pdfIn PDF document text
- http://brlairport.com/images/file/64691869630.pdfIn PDF document text
- http://ibtaker.ps/userfiles/file/90180245295.pdfIn PDF document text
- http://muszempilla.com/files/file/19754190710.pdfIn PDF document text
- http://touchpanelpro.com/upload/files/joforisujoje.pdfIn PDF document text
- http://andlupa.com/userfiles/file/86932573385.pdfIn PDF document text
- http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c94a4aa495---66472978427.pdfIn PDF document text
- https://searchlink.org/userfiles//file/20897802268.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=bleeding+edge+pynchon+pdfPDF link annotation
- 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_off000105a2.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x105A2 | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_01_sfnt_off00011db9.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x11DB9 | 10536 bytes |
SHA-256: df75e0eb83e88f081250956d7d9b31abd9dadf37105d25f5e15a4db0736ac49d |
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font_02_sfnt_off0001355e.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x1355E | 18620 bytes |
SHA-256: 5ce068aa621e4e7b2baad4396d5515b3582ec51b6fc204848955b8943637c13f |
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