MALICIOUS
176
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
This PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The heuristics indicate it functions as a link farm and a callback phishing lure, prompting users to call a number in a context of billing or security issues. While no scripts were explicitly extracted, the presence of numerous embedded URLs suggests a mechanism for directing users to malicious sites or initiating further malicious actions.
Machine Learning
- Nyx PDF Classifier malicious score 0.9964
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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Callback phishing phone lure medium SE_CALLBACK_LUREDocument asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
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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=extract+page+of+pdf
- http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e026a0d92a---71517400336.pdf
- http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607678e7f1bf2---vivan.pdf
- http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160b725833e188---narozakudep.pdf
- https://matskaren.se/anvandarbilder/203/files/69437910349.pdf
- http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa012c58f84---rizit.pdf
- http://nickels.design/ckfinder/userfiles/files/xupapidijenilawiwotatonix.pdf
- https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/2b33d13ecbc6921877ca360f365d0f3a/nupekatewulemitumeputoxu.pdf
- https://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160910d2c0ca73---vararagizuvajiposa.pdf
- https://mrmobilewebsite.agency/wp-content/plugins/super-forms/uploads/php/files/577d7076de1cfe73646095695c53a2a4/lagosularatodotazibebi.pdf
- http://gezond-trakteren.nl/kasteel-doornenburg-img/bestandenfile/79512396784.pdf
- https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/9e3274a74a734fdbf319620ccfd4d802/pixusarijorariruladujar.pdf
- http://soflocops.net/clients/81266/File/17696496016.pdf
- http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a6e3d37136---zalojexusa.pdf
- http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a5ecded9b19---kezar.pdf
- https://www.cpro.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16070b913910ee---vomegopelorevitufod.pdf
- http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a4931f3f08---10635110738.pdf
- http://yeosingol.com/FileData/ckfinder/files/20210619_41ECF4CE82FF007E.pdf
- http://resetimpianti.it/reset/public/file/dosugorodofigagezemi.pdf
- http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/16094bec173ed5---12754397219.pdf
- http://ferramentabelleggia.it/public/file/bapojedetav.pdf
- http://goldnumber.info/userfiles/file/mosexodofujawej.pdf
- http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160878b0b375fd---1545083798.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_off0000ee7a.binfb9b0bff6cd46dc622461c3246d3c2e1f27c6257a037c95de9fd8b0c1d0d839c |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xEE7A | 18380 bytes |
font_01_sfnt_off00011f17.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x11F17 | 16792 bytes |
font_02_sfnt_off0001372e.bin4e37fa35e50c5eb210d3509fc11b197caff859d04f6bb3d5f130ee35857c1aa9 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x1372E | 10472 bytes |
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