MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The PDF contains numerous embedded URLs pointing to external websites, many of which are hosted on compromised or disposable domains, indicating a link farm or phishing lure. The ClamAV detection and ML classifier strongly suggest malicious intent, specifically identified as a phishing trojan. The presence of external URI links and compromised CMS upload links points towards an attempt to redirect users to malicious content.
Machine Learning
- Nyx PDF Classifier malicious score 0.9958
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 https://oniceh.ru/uplcv?utm_term=adb+usb+driver+windows+7+32+bit+download
- http://soles2walk.cz/data/file/5784931677.pdf
- http://vipnovini.bg/root/f/uploads/files/meganolexoki.pdf
- https://www.huaikrachaohospital.go.th/assets/global/lib/ckfinder/userfiles/files/sesaginabu.pdf
- https://njshore.drinkpoint.com/uploads/files/92317981763.pdf
- http://hueide.com/upload/files/91803127195.pdf
- http://77owship.netsociality.com/upload/files/pepulobilusuk.pdf
- http://rayanchem.com/d/files/rutonefupuxarinanirik.pdf
- https://macauroommate.com/ckfinder/userfiles/files/75073480544.pdf
- http://eyupsifalibitkiler.com/resimler/files/kelamuwedefaza.pdf
- http://iowatriallawyer.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/35073233107.pdf
- https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/331b155be47fb9e71cf8c8709c295cbf/68637571809.pdf
- http://apsara.ru/userfiles/file/kutovivukunedikomasadi.pdf
- https://slicktechproducts.com/newerac2c/userfiles/file/81572947189.pdf
- https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e6a8169c3c---funejilufojonuba.pdf
- https://stonebuild.bg/f/uploads/files/46925885678.pdf
- http://kerama.altrodesign.eu/ckfinder/userfiles/files/riwesopokotapox.pdf
- http://arci-mp.fr/admin/File/80349376258.pdf
- http://rdasesores.gestconcursal.com/editor/ckfinder/userfiles/files/15792007807.pdf
- https://riondene.ch/img/uploads/file/4122292950.pdf
- http://medtravel.pro/images/hand_uploaded/files/xuliv.pdf
- http://www.pacautomarketing.com/file/11871123970.pdf
- http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/jumbfhae1s5t8u2pd1tb9i9qb0/31619059868.pdf
- https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/161408f4be93f5---nofumaw.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_off0000d319.bin968fa5794f149d61d7ea495480fe9ab260ad51d14e9483e1e39c16e9c1829849 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xD319 | 10956 bytes |
font_01_sfnt_off0000ecca.bin523f12be9661df91406d6fee711092b5e7ae60c63b6b0e3f4b4b8a98d4bb4b62 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xECCA | 16168 bytes |
font_02_sfnt_off00011677.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x11677 | 16792 bytes |
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