MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with numerous embedded URLs pointing to potentially compromised WordPress sites and disposable hosting. These links likely serve as a lure to phishing or malware distribution sites, aligning with the 'Spearphishing Attachment' technique.
Machine Learning
- Nyx PDF Classifier malicious score 0.9991
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://crysiq.ru/uplcv?utm_term=how+to+stop+videos+from+autoplaying+in+chrome PDF link annotation
- http://bitite.lv/media/txt/122/file/45221593681.pdfIn PDF document text
- http://zensushialiso.com/uploads/files/59315408436.pdfIn PDF document text
- https://doctmcooper.com/userfiles/files/jibakoziwejoladuborabo.pdfIn PDF document text
- http://lifecare4all.com/upload/files/81555559631.pdfIn PDF document text
- https://diphong.com/uploads/wivoxeguduxem.pdfIn PDF document text
- http://microsolder.hu/userfiles/files/53787250700.pdfIn PDF document text
- http://sfalojistik.com/userfiles/file/xuzejomagevisag.pdfIn PDF document text
- http://kcpsystem.com/userData/board/file/mirufigakunifigowimigas.pdfIn PDF document text
- http://skkl.cn/filespath/files/20210909034838.pdfIn PDF document text
- http://giayviettri.com/img-ftec/files/werodemakejivata.pdfIn PDF document text
- http://sanalights.com/admin/admin/uploadfiles/file/94533192983.pdfIn PDF document text
- https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613fcf4a90dc2---vobamuxomibosep.pdfIn PDF document text
- http://honderhotel.com/UploadFiles/FCKeditor/20210903043118.pdfIn PDF document text
- http://purofirstli.com/userfiles/files/xupaxir.pdfIn PDF document text
- https://qualityroofinnandsuites.com/nbloom/fckuploads/file/83183803534.pdfIn PDF document text
- http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b9a77c26f2---14045026995.pdfIn PDF document text
- https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/16132b146d7f16---zokomozatejonivikevakizo.pdfIn PDF document text
- http://urduhadith.org/survey/userfiles/files/4266192752.pdfIn PDF document text
- http://dinobajka.pl/Upload/file/791547311.pdfIn PDF document text
- http://ternovykh.ru/content/file/vetofelefexotavip.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_off0000e789.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE789 | 18184 bytes |
SHA-256: af63f7bd63b143656bb6d0b62ea53ff22ba78ce8081a423c2fe3dfc99b81ddce |
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font_01_sfnt_off00011672.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x11672 | 11424 bytes |
SHA-256: 842f81a8f984ee7fb10561f20f9ecd41465fec1d1cd629528da1b42b41c8214c |
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font_02_sfnt_off00013111.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x13111 | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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