MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The PDF contains numerous embedded URLs, many of which are hosted on compromised WordPress sites or disposable hosting, indicating a link farm designed for malicious redirection. The ClamAV detection and ML classifier strongly suggest a phishing or trojan payload delivery. The document body is heavily obfuscated and unreadable, providing no direct user-facing content, but the heuristic firings confirm the malicious intent of the embedded links.
Machine Learning
- Nyx PDF Classifier malicious score 0.9964
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://chcial.ru/uplcv?utm_term=hex+to+octal+converter+with+steps
- http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608331ebf2a1e---gesimimusenotoz.pdf
- http://nhadatv.com/webroot/img/files/manilipetanonasuf.pdf
- https://tungqibiotech.com/upfiles/editor/files/62152517969.pdf
- http://4seasonstours.in/userfiles/file/pumoziz.pdf
- https://swift-tw.com/lcc/upload/files/43075609864.pdf
- https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/1a6bbbaeecaa78f58740571f7e3ffdaa/dobetan.pdf
- http://hyderabadibiryanicorner.com/admin/images/file/tonab.pdf
- https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/92e7ade490115bb4af5beead465d3ab1/tokuwavuzorov.pdf
- http://www.vandiestbrandstoffen.be/uploads/files/bireraro.pdf
- https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc77acbed4---49731410497.pdf
- http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609d341e7d34f---69294873124.pdf
- http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606f228a1752b---29094827461.pdf
- https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/f5c457177a7a91127ab4bb27070bf4e0/sarerafofogefukitorezit.pdf
- https://balajitutorial.com/admin/userfiles/file/pevezamonasopoxu.pdf
- https://cottonweb.net/userfiles/file/navasojidofowo.pdf
- https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/f8e2d29947e4527330f2da2d25b03416/46372790196.pdf
- http://www.hydro-tg.pro/upload/file/vifimegovazavulivepe.pdf
- http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/160e1836e100e0---nigesujikat.pdf
- https://functionalmovement.gr/wp-content/plugins/super-forms/uploads/php/files/97564562948435b2536967a21d5754d0/89251259116.pdf
- http://kaies.cn/upfiles/file/94919675908.pdf
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bda992f898---41197849021.pdf
- https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/e5b1cc5c6d80b5d266ae5aad7ddd81cc/kemejufegesesosijefituto.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_off0000dc48.bin8e5a7625c4b3ebcb75c494685a1533a3df1db0be76177d7c19217c6748229742 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xDC48 | 10716 bytes |
font_01_sfnt_off0000f4de.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF4DE | 16792 bytes |
font_02_sfnt_off00010cf0.bin6196fc3cb92b3a8cb5384399e43153ac3006e2d3c2a07afbe6b1aa39c176998b |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x10CF0 | 18212 bytes |
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