MALICIOUS
156
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. It contains numerous embedded URLs that form a link farm, pointing to various domains, some of which are hosted on compromised CMS uploads. The primary purpose appears to be directing users to potentially malicious external sites.
Machine Learning
- Nyx PDF Classifier malicious score 0.9985
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://worldcar.jp/userfiles/files/81565517099.pdf
- https://waroproject.com/file/40665380054.pdf
- https://festival.bg/fckeditorfiles/file/61327520079.pdf
- https://cokhivietuc.com/img-vietuc/files/31326634799.pdf
- https://www.kbstephens.com/wp-content/plugins/super-forms/uploads/php/files/c39a0203ae1e019f4780f455a2e2e5c4/berolutatoxezufevalo.pdf
- http://neoneofytou.com/ckfinder/userfiles/files/48435825589.pdf
- http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/1609f776be1dff---pidifiruvolorul.pdf
- https://earplighting.com/wp-content/plugins/super-forms/uploads/php/files/a60d712a458b015506d91c6791e1ec08/87266227441.pdf
- https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/jkphutrdn32e5kdopq7i56j996/74971355681.pdf
- https://jakspravnenapsa.cz/userfiles/file/rodatonedozalikuvuv.pdf
- https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16094ddc34fead---20198428688.pdf
- http://myucmas.com/userfiles/file/revasumen.pdf
- http://kuresi-kaitori.com/upload/content_pic/files/9505592340.pdf
- http://biogenetec.tw/image/files/20210802_012118.pdf
- https://engravestone.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b0fffb82b1---xedapenopate.pdf
- http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606ffee802c42---81770213641.pdf
- https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2b1a1e6ab3---11161926309.pdf
- https://free-spirit-city.eu/uploads/wysiwyg/files/4870223191.pdf
- http://micronforgacsolo.hu/UserFiles/file/24243385617.pdf
- http://wenxuezj.com/images/File/10553201797.pdf
- https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/84e1db4a64fd0f74f2df813dff057b3a/34517909828.pdf
- http://nousgarage.com/userfiles/file/45006620891.pdf
- https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610701d423304---58670854058.pdf
- https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=multiplicaci%C3%B3n+de+fracciones+algebraicas+ejercicios+resueltos+pdf
- http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c1580becfd---desar.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_off0000f6ab.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF6AB | 16792 bytes |
font_01_sfnt_off00010ec2.bin4fdb5a61ba1e3a0819150428974f38087808b15746c40295cbb33c0952cad708 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x10EC2 | 11296 bytes |
font_02_sfnt_off000128ba.bin4adb44af44a4273b130349b7bdd448b8359c7e4b0c1715425d96b2d9061b4a8c |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x128BA | 18988 bytes |
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