MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, many pointing to compromised CMS upload storage or disposable hosting, suggesting a link farm used for phishing or malware distribution. The presence of PDF-specific heuristics like 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this. Although no scripts were explicitly extracted, the PDF format itself can embed JavaScript, which is often used to redirect users to malicious sites.
Machine Learning
- Nyx PDF Classifier malicious score 0.9974
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://nomylo.ru/uplcv?utm_term=can+you+get+aptoide+on+ios PDF link annotation
- https://tramhuonghanoi.vn/upload/files/siperevasojozid.pdfIn PDF document text
- http://xn--66-6kc8bfmkmjd.xn--p1ai/admin/ckfinder/userfiles/files/48219059624.pdfIn PDF document text
- http://rebizplus.com/userfiles/file/bidakoki.pdfIn PDF document text
- http://about-dogs.ru/upload/file/55327005554.pdfIn PDF document text
- http://bkht.vn/userfiles/file/labowujuxinazimiwugadunu.pdfIn PDF document text
- https://jotekonybakterium.hu/userfiles/files/58034186616.pdfIn PDF document text
- http://www.w.radeton.cz/ckfinder/userfiles/files/35670595217.pdfIn PDF document text
- https://cowichanmusicfestival.com/userfiles/file/poxewubal.pdfIn PDF document text
- http://maynenkhipuma.vn/quangbasanpham/app/webroot/upload/image/files/dejewaruwi.pdfIn PDF document text
- http://philipsphotographystudio.com/38484950326.pdfIn PDF document text
- http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16132b434979f2---nisajifivowole.pdfIn PDF document text
- http://ihdbd.org/upload/files/17259988878.pdfIn PDF document text
- http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f10bc4fa2f---8711173748.pdfIn PDF document text
- https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/d0db6ead317c4e0489e9ec61e2f1770a/jijazivupoperewukaluwov.pdfIn PDF document text
- https://gulfb2b.com/userfiles/file/zexojigekom.pdfIn PDF document text
- https://bucatariizidite.ro/printuri-fi/files/8021511929.pdfIn PDF document text
- http://xetaihyundai.net/upload/files/74672961438.pdfIn PDF document text
- http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/161390afe8d2f5---didamebotaxonewupej.pdfIn PDF document text
- https://hostsolutions.ro/app/webroot/files/userfiles/files/sutojexirububeviturepit.pdfIn PDF document text
- http://liily.jp/upload/file/20210904141515.pdfIn PDF document text
- http://www.oomewatersport.nl/upload/files/ronutumujipu.pdfIn PDF document text
- https://cherrychile.cl/cherry/uploads/contenido/files/49089425141.pdfIn PDF document text
- http://ongxoanhdpe.vn/upload/files/54133293452.pdfIn PDF document text
- http://birzebbugastpetersfc.com/files/file/86722919173.pdfIn PDF document text
- https://atvatextile.com/upload/ckfinder/files/6991640348.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_off0000e421.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE421 | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_01_sfnt_off0000fc33.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xFC33 | 18216 bytes |
SHA-256: 7c5af56d026b0f7e7d97433088413da942ca52522d163562b6a6f923a7b6f1d0 |
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font_02_sfnt_off00012b54.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x12B54 | 10664 bytes |
SHA-256: e23361bf09de216b2929b24bf6c26ff4a79a82848b3759fa9e6e259da69a7c14 |
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