MALICIOUS
164
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. It contains embedded JavaScript and a significant number of external URIs, many of which point to compromised CMS upload directories or are part of a link farm on disposable hosting. The embedded JavaScript likely facilitates the redirection to these malicious sites, serving as a lure for phishing or malware distribution.
Machine Learning
- Nyx PDF Classifier malicious score 0.9956
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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Embedded JS stream low PDF_JSPDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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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://krisoc.ru/uplcv?utm_term=android+swipe+gesture
- https://www.shropshirefurniture.co.uk/admin/ckfinder/userfiles/files/subawigizi.pdf
- http://lollanaclinic.com/image/upload/File/fuvegiwu.pdf
- http://healingtown.org/userData/board/file/66951404073.pdf
- http://ideal-site.ru/userfiles/file/52374504918.pdf
- https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/4feefd52271dea08e38e4bba797122d8/vonegu.pdf
- https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/72f6507768e087302b5ad7dbb14eddf2/44772470955.pdf
- http://myhomeinparis.com/userfiles/files/6157293323.pdf
- http://erfaspot.com/resimler/files/rilikujid.pdf
- http://lukoilmarine.com/ckfinder/userfiles/files/nabipuzevirubatitafurofu.pdf
- http://quaretti.it/userfiles/files/2837711353.pdf
- http://prochem.vn/images/uploads/files/vewudidafukesulobutesolor.pdf
- http://maility.pl/_ADRESuserfiles/file/zipufedusonanovomujabun.pdf
- http://xn--spreewaldpension-lbben-9lc.de/meineBilderAlbertGrundschule/file/mawixuritasar.pdf
- https://denizlihorozu.com/resimler/files/bamoxizilijososumitogato.pdf
- http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/16139ca7e91cf5---40109802474.pdf
- http://atthaya.com/file_media/file_image/file/43429452994.pdf
- http://top-rubber.com/admin/fckeditor/editor/filemanager/connectors/upload/file/mevafud.pdf
- http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/16131d3793a95f---66263812110.pdf
- http://yourhealthyanswer.com/ckfinder/userfiles/files/954633185.pdf
- https://empezo.xyz/js/ckfinder/userfiles/files/wakewazipirisibelejabuv.pdf
- https://phuketwebstudio.com/ckfinder/userfiles/files/22774566260.pdf
- http://milwaukee.center/userfiles/file/96689057762.pdf
- https://jechrina.gr/FCKeditor/userimages/file/72936713333.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_off0000b26c.bin2d22059d096a64559ba2b7aaa24c5098d82fa78dd1d347da044ce569e6e34c98 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xB26C | 10524 bytes |
font_01_sfnt_off0000ca62.bin93f5fa8f0f9be705dac66edce9d17e426046a2fba9c207bbb83e25b951dda728 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xCA62 | 18280 bytes |
font_02_sfnt_off0000f9b1.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF9B1 | 16792 bytes |
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