MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Numerous external URLs were extracted, many pointing to compromised CMS upload storage, suggesting the PDF acts as a lure to download further malicious content or phish credentials. The presence of PDF-specific heuristics like 'PDF_URI' and 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this attack pattern.
Machine Learning
- Nyx PDF Classifier malicious score 0.9965
Heuristics 6
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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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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://chcial.ru/uplcv?utm_term=copy+pdf+to+excel
- https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/sg981pulh05p2085n0alfn65a3/47508982339.pdf
- http://besteva.com/upload/files/42699552824.pdf
- http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161415e6ab022a---lasusirisosuka.pdf
- https://restaurant-kamkok.fr/img/Data/file/zererapomomidap.pdf
- http://bocghebinhduong.com/media/ftp/file/21378304616.pdf
- http://tangneylaw.com/admin/images/file/puvakazebiniduporumafu.pdf
- https://digitaluzaktanegitim.com/calisma2/files/uploads/rogovasebefodo.pdf
- https://ohcsi.com/ckfinder/userfiles/files/11091969177.pdf
- http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16131d85fd40dd---78272513361.pdf
- http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cadc792b1a---49682225944.pdf
- https://virker-ikke.dk/files/19940019318.pdf
- https://cartolmania.it/file/80200765035.pdf
- http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16132cdb9e4a6c---tebulonuzewu.pdf
- https://premiersuli.hu/files/files/72085264644.pdf
- http://morecoredesign.com/images/imageUps/files/poxajisekitinimogufewo.pdf
- https://mebelihome.ru/upload_picture/nudinokisipodudal.pdf
- http://matonaklawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/46809970059.pdf
- http://easternhoteljeju.com/FileData/ckfinder/files/20210919_AC3BDEE18E7ACA79.pdf
- http://weiddy.com/uploads/files/202109091527145262.pdf
- http://mpu-beratung-brendle.de/userfiles/file/dabipidanek.pdf
- http://salsainkonstanz.de/media/files/jared.pdf
- http://www.shjkyq.com/up_files/FCK/file/rakobukolujimajovotide.pdf
- http://businessvaluationapp.com/fck_files/file/49774695217.pdf
- http://wirtrauenuns.ch/images/file/rakotixugesijawaf.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_off000108cc.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x108CC | 16792 bytes |
font_01_sfnt_off000120de.bin215a62a0624b18b6ce6087f67e9d529f50cc3b27b98c40380b18b91329a17e06 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x120DE | 18592 bytes |
font_02_sfnt_off000150fb.bin10fdf94c7fded8641d38f5ff6990adf4502c2e6ba14de169127850b3e58c73f3 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x150FB | 10232 bytes |
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