MALICIOUS
164
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The PDF contains embedded JavaScript and numerous external URIs, indicating an attempt to execute code and redirect the user. The presence of a link farm on disposable hosting and compromised CMS upload storage suggests a phishing or malware distribution campaign. ClamAV detection and ML classification further support its malicious nature.
Machine Learning
- Nyx PDF Classifier malicious score 0.9968
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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Embedded JS stream low PDF_JSPDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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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=psn+messenger+apk PDF link annotation
- http://k-sta.kr/FileData/ckfinder/files/20210903_F47B3B2E88FF6E08.pdfIn PDF document text
- http://373113.linker.tw/files/sunuxi.pdfIn PDF document text
- https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e9a7419930---zeguw.pdfIn PDF document text
- http://kleinschaden.expert/userfiles/file/musepifelekosofizupawiwa.pdfIn PDF document text
- http://k-ookuma.com/js/upload/files/zenuwevitumutetajole.pdfIn PDF document text
- http://kunjipsc.com/uploads/files/tebisepurejubexepewoli.pdfIn PDF document text
- http://fukaofoods.tw/uploads/files/202109170719461011.pdfIn PDF document text
- http://thestarbusan.net/FileData/ckfinder/files/20210905_138DD5AAB44598A8.pdfIn PDF document text
- https://doctmcooper.com/userfiles/files/96189086259.pdfIn PDF document text
- https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/755e875c0c1b0aa240b0a71f627242ed/520882405.pdfIn PDF document text
- https://windscrm.net/files/file/21824016918.pdfIn PDF document text
- https://www.mppoa.cloudlinesystems.com/assets/ckfinder/userfiles/files/mifipeg.pdfIn PDF document text
- http://webs123.com/userfiles/file/dikalagemizalifodozuxita.pdfIn PDF document text
- http://marleenjansen.nl/images/uploadfiles/10616696643.pdfIn PDF document text
- https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/4bc0cb0071587fe2514a96f1e2181756/guwawejixarafeno.pdfIn PDF document text
- https://clickbox.ro/images/file/42381475766.pdfIn PDF document text
- https://huuphongplastic.vn/uploads/images/files/37394650902.pdfIn PDF document text
- https://perfecthospital.org/ckfinder/userfiles/files/tedere.pdfIn PDF document text
- http://utpcomp.ru/uploads/files/kewizabowozozezuvo.pdfIn PDF document text
- http://5percent-design-action.com/upload/users/files/vokoxunajituroxuwekavuge.pdfIn PDF document text
- https://electroagro.es/pub/files/57090450968.pdfIn PDF document text
- https://noticky.net/akce/fotky/file/mosogokujejasomofuneve.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_off0000cfe4.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xCFE4 | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_01_sfnt_off0000e7f6.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE7F6 | 18168 bytes |
SHA-256: ec22227ea1fc2aa790d3e4c98cfa8dfd44ab2995a79aa022f22f962751583381 |
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font_02_sfnt_off00011723.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x11723 | 10332 bytes |
SHA-256: d280b362206aed5c35f3cf132c6668dca1e847805b38fee1256a418feaa680e6 |
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