MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple external URLs hosted on potentially compromised or disposable domains. The presence of embedded URLs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic strongly suggest a phishing or malware distribution campaign, likely initiated via spearphishing attachment.
Machine Learning
- Nyx PDF Classifier malicious score 0.9994
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=how+much+do+chief+financial+officers+make
- http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608082e26581e---12164986434.pdf
- https://combrooncom.com/contents//files/jisaxegabub.pdf
- https://www.m2asolutions.com/wp-content/plugins/super-forms/uploads/php/files/7cd69adbd317dc4d42c20156790a8552/99788513015.pdf
- http://hotelbelleepoque.bg/userfiles/file/zamobusiguxiw.pdf
- https://spheresignal.com/app/webroot/userfiles/files/rowolejabopu.pdf
- http://hilltop1976.com/clients/24685/File/siloxeradupegaxaja.pdf
- http://haumeaonline.com/userfiles/file/tubuto.pdf
- http://tulga.ru/editor/files/gazobudevepiwovanof.pdf
- http://alanurturizm.com/rsm/files/nexiwaku.pdf
- http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c963b59de11---kubuxexaxuxutojugodadif.pdf
- http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607040964b093---26994461061.pdf
- http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/160d29941ee341---68997380849.pdf
- https://thietbivesinhanhhuy.com/asset/files/23798456895.pdf
- https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607570ac1082f---51540708636.pdf
- http://alianzablue.com/aym_image/files/88315712355.pdf
- https://callalilyvn.com/upload/files/29544164218.pdf
- http://naturabliskociebie.pl/userfiles/file/veguvetojalinelerinup.pdf
- https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/i2qgfgj4ma71l3i0ha0jme7n0i/lozufiteki.pdf
- http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160c319368392c---segorowumefir.pdf
- http://singer-island-condos.com/userfiles/files/morapa.pdf
- http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/530r9ulf7njfn6jf0ord5qq7t0/vokiwugako.pdf
- https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/9b180cd692a9d47516c659aadc026131/53405140728.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_off0000eecc.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xEECC | 16792 bytes |
font_01_sfnt_off000106de.bin1c8b21c3d7f502020710bf777583b5f795129a2a0331f5be8d238bfc818a27c2 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x106DE | 18048 bytes |
font_02_sfnt_off00013609.binb54a75b6ba5dd11dd060ea47549e3a866a6e6d8fd2b935080ac76242ddcb52aa |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x13609 | 10912 bytes |
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