MALICIOUS
164
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.
Machine Learning
- Nyx PDF Classifier malicious score 0.9907
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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Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTONDocument contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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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=possessive+pronouns+quiz+multiple+choice PDF link annotation
- https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/89abe5b755b8a3aee997e932bb796926/wowurowiwanape.pdfIn PDF document text
- http://tentimesneedlehill.com/UPFILE/userfiles/files/fogulubirorexik.pdfIn PDF document text
- https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/e9763163a23b27c5fd33496d3caeb891/24908319889.pdfIn PDF document text
- https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/5e1b7913d58617320183648655a34d67/nidaxipamewituzokuremoxo.pdfIn PDF document text
- https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f74d2e4399---31832592550.pdfIn PDF document text
- https://aymexco.eu/ckfinder/userfiles/files/petixezuderazusel.pdfIn PDF document text
- https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160789fda60468---dovusagix.pdfIn PDF document text
- http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae6eecac560---gifuwokakogunigoketevanu.pdfIn PDF document text
- https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/kphe77dsirt1ckpi882bibu0j6/kanawapeno.pdfIn PDF document text
- https://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/160be31984599a---41203381676.pdfIn PDF document text
- http://expertcomptablecourreges.fr/michel_courreges/userfiles/file/nefefatonadowesijapix.pdfIn PDF document text
- http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/16088db416cda6---fobivuwugolu.pdfIn PDF document text
- https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0788d8552---39666829147.pdfIn PDF document text
- http://gayaarchi.com/userfiles/file/20210720121313.pdfIn PDF document text
- https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607f410703056---lisigakibisizudunobos.pdfIn PDF document text
- https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/l9hfitbniahkjl17pme05ob158/38433383763.pdfIn PDF document text
- http://autodilykanka.cz/cmsimple/images/file/7917655955.pdfIn PDF document text
- http://leaguengn.com/userfiles/file///xiparutinom.pdfIn PDF document text
- http://jerilyndavisrobison.com/clients/870655/File/mitugesexubefaxedapuvuz.pdfIn PDF document text
- http://boathousebrokerage.com/userfiles/file/15847300231.pdfIn PDF document text
- http://ozdoby-betonowe21.pl/Upload/file/60573593243.pdfIn PDF document text
- https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/f5ed64fa44c704db17f4f30a502ab06a/87101274323.pdfIn PDF document text
- http://mini-garden.ru/userfiles/file/4773488996.pdfIn PDF document text
- http://kondicionery-ivanteevka.ru/upload_picture/file/vafeniruvajaf.pdfIn PDF document text
- http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a65998903aa---pewazusobejezezexorudu.pdfIn PDF document text
- https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/bamasezerifiguxejipo.pdfIn PDF document text
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
Extracted artifacts 3
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0000c1bf.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xC1BF | 16896 bytes |
SHA-256: 69cde37124750b39ea0ef4a307d0ef3251f7ab90d5a33fc2837982f2ebec25f5 |
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font_01_sfnt_off0000ece1.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xECE1 | 10848 bytes |
SHA-256: f0a3781b31e6f5cb4d265a10107bb1a01757b61abc55260899861a99cf581049 |
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font_02_sfnt_off000105d8.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x105D8 | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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