MALICIOUS
176
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The ML classifier and ClamAV detection strongly indicate maliciousness. The PDF contains numerous links to external sites, many hosted on compromised WordPress installations, suggesting it's part of a link farm designed to redirect users to malicious content. The 'SE_CALLBACK_LURE' heuristic confirms the document's intent to trick users into making a phone call, a common tactic in phishing and tech-support scams.
Machine Learning
- Nyx PDF Classifier malicious score 0.9942
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://queure.ru/uplcv?utm_term=ord+to+stt+nonstop
- http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16090c78bafd14---zuburodasaguzigofizir.pdf
- https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/266a55189ccd16e8bee921dc5c1dfd06/rojesipimesidit.pdf
- http://dok-vo.ru/userfiles/file/fujesibenivi.pdf
- http://chupanhnoithat.vn/upload/files/tuwotezarobaduso.pdf
- https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e7669c0d0f---todigure.pdf
- https://fototipia.hu/files/files/5546715421.pdf
- http://www.srijonihealinghome.com/fckimages/file/vujowigawakasor.pdf
- https://bandotrading.com/uploads/file/54873077835.pdf
- https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/hj74ul62nhaf6717ne64g908so/penixi.pdf
- https://zionapostolicministries.org/uploads/file/32729088156.pdf
- http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16093ae853d86a---kuzepene.pdf
- https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/2656c440e6bf797ddd879e6f32c3a944/89169155441.pdf
- https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/9sb7u9gmsmgg944nt1nuf216bf/38016110308.pdf
- http://dhf-china.com/d/files/3640703885.pdf
- https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16080cba6ecece---86473864230.pdf
- http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/24a8b2ef11d5ddf9ee97630e18bdadc4/lizizatidu.pdf
- https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/160945f6d384ce---22318293722.pdf
- http://bjsprt.com/uploadfile/file///2021062504042550.pdf
- http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d819eef13e0---15735316352.pdf
- https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be64c6f3783---5290891217.pdf
- https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a63255d889---jirilubuzufomejejumaniki.pdf
- https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ac90a827f2b---damorobixir.pdf
- https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/eaa65034996e17c9d9c58f4a214577d9/pajavaneg.pdf
- http://4bzsoftware.com/Images_upload/files/88653646309.pdf
- https://lea-inc.com/wp-content/plugins/super-forms/uploads/php/files/7318236aeec6ddf872030830936a8db6/lagerawades.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_off0000edb4.bin28050b907eb179469c89b86cd9096860fbc743a3718c4e5fc0bcc2df6cad73ae |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xEDB4 | 18248 bytes |
font_01_sfnt_off00011ded.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x11DED | 16792 bytes |
font_02_sfnt_off00013603.bin37b61fd2d0aa2991e59d97315780e64950d97a98841b0cf1f97f5a0ecbcd5e00 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x13603 | 9980 bytes |
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