MALICIOUS
176
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
This PDF document was flagged as malicious by a machine learning classifier and ClamAV, indicating a phishing or trojan threat. The document contains a link farm pointing to various compromised WordPress sites and disposable hosting, suggesting an attempt to distribute malicious content or redirect users to phishing pages. The presence of a callback lure heuristic further supports the assessment that this document is designed to trick users into contacting malicious actors under the guise of support or billing issues.
Machine Learning
- Nyx PDF Classifier malicious score 0.9990
Heuristics 7
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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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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://irlanc.ru/uplcv?utm_term=samples+of+instruction+manuals
- https://aartipalette.com/userfiles/file/31561355624.pdf
- http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/78f1a6cfe564c530dc10a5d151e1a681/rusov.pdf
- http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606fe75731bdb---penujono.pdf
- http://alemotta.com/resources/original/file/vulepejomapunatoxisab.pdf
- https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/98b172973643e1465e479d76d348e08f/60966615970.pdf
- http://reszke.pl/fckeditor/editor/filemanager/connectors/php/file/46367245779.pdf
- https://leo-translate.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16087ff0b93d54---jonijifetuso.pdf
- https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/dhi4muauq89td1ljed1h6f2j57/94065317278.pdf
- https://cottonweb.net/userfiles/file/vobigopidamepabido.pdf
- http://aircond.md/upload_fck/file/44770576754.pdf
- https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/tmp/ninotaxademakukumow.pdf
- http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/3ktgef566i6lumlnludp9212o7/26563770501.pdf
- http://womenwhorockarkansas.com/clients/4/4c/4cfcdabbb7b8ad81bafe9a4295858145/File/87575730825.pdf
- http://hrudolf.com/userfiles/limurokuzejasobivexumufa.pdf
- http://sushikyototogo.com/uploads/files/31451237201.pdf
- http://tscyw.net/userfiles/file/20210626012639_p4mfvb.pdf
- http://brainbond.ro/userfiles/file/57089038058.pdf
- http://barudan.hk/UploadFile/file/20210527010724478.pdf
- https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/8iu9q7sb744gub4hb86k6bvcom/kipaludove.pdf
- https://sport-jicin.cz/dokumenty/90668103344.pdf
- http://santeh.md/img/files/83596419960.pdf
- http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/8otnaic8d7uv8blivr1mle44k3/71582094204.pdf
- http://g-shocktou.com/user_file/file/1689919854.pdf
- http://libron.pl/fckupload/assets/file/17494736687.pdf
- http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160726e8a3d144---8976444498.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_off0000b674.bin413fb228101e2e207c5a3ec8768e90ec78fd843f01221fcfd0dc6761d0fbcacb |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xB674 | 14664 bytes |
font_01_sfnt_off0000da9b.binf8ac46ef25f66179636634c12a749a76750ccd971d43565317463ae657860007 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xDA9B | 10816 bytes |
font_02_sfnt_off0000f37e.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF37E | 16792 bytes |
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