MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs that form a link farm, with several pointing to compromised WordPress sites or disposable hosting, suggesting a phishing or malware distribution scheme. The presence of external URIs and link farms points towards an attempt to lure users to external malicious content.
Machine Learning
- Nyx PDF Classifier malicious score 0.9908
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://chcial.ru/uplcv?utm_term=grade+10+nelson+math+textbook+answers PDF link annotation
- http://jca-t.com/fck_image/file/4307530714.pdfIn PDF document text
- https://houstoncoinclub.org/FCKeditor/file/54868191251.pdfIn PDF document text
- http://kondicionery-vidnoe.ru/upload_picture/file/3250610966.pdfIn PDF document text
- https://beaszemin.com/files/nojagudaminebobesizeribud.pdfIn PDF document text
- https://tramtron.vn/uploads/files/files/nipozuxiveka.pdfIn PDF document text
- http://lamekatus.com/uploads/ckeditor/files/578513064.pdfIn PDF document text
- http://grupafurman.pl/!mag2011/userfiles/file/xorutixizitakebezu.pdfIn PDF document text
- http://aaaexpressac.com/userfiles/file/54559333783.pdfIn PDF document text
- http://dlevitin.ru/fck_editor_files/files/nulikameboma.pdfIn PDF document text
- http://huntland.hu/upload/file/lanuvopofirevubi.pdfIn PDF document text
- http://albachiara.info/userfiles/files/fapoxusazidokonudexeba.pdfIn PDF document text
- https://nieruchomosciturystyczne.eu/files/file/83509832049.pdfIn PDF document text
- http://satisfytech.com/ck/upload/files/58523207696.pdfIn PDF document text
- http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615034a89b8f8---jijano.pdfIn PDF document text
- http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615303c71d46c---18609866352.pdfIn PDF document text
- http://mariopresto.pl/userfiles/file/83826177951.pdfIn PDF document text
- http://mebco.ru/images/file/lajenotenasip.pdfIn PDF document text
- http://sangiorgioautoservizi.com/userfiles/files/marixokosufawixotesi.pdfIn PDF document text
- http://artechq8.com/beta/uploads/files/wazazafatatevivalefaxi.pdfIn PDF document text
- https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/16149e2ed78d04---lazijevawimusemoduti.pdfIn PDF document text
- http://centronegozi.com/public/61810401701.pdfIn PDF document text
- https://avphunter.ro/ckfinder/userfiles/files/bomiketevuku.pdfIn PDF document text
- http://www.offshoreyachts.net/web_upload/editor/files/xulukazewoti.pdfIn PDF document text
- http://yokosohk.com/files/fckfiles/file/loxukesosofumu.pdfIn PDF document text
- http://dailymaytrogiang.com/userfiles/files/gigoze.pdfIn PDF document text
- https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/7sk0q2es1fc8vtf8k0khc4k24u/vakexogibamopob.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_off0000c10a.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xC10A | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_01_sfnt_off0000d921.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xD921 | 11056 bytes |
SHA-256: e41ab301e3b8526bbe9d05a863734f76118f6a4b67dbd08413f106a8158854b3 |
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font_02_sfnt_off0000f2c5.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF2C5 | 15932 bytes |
SHA-256: 74c21e6154a2da6c24e685bf90587afc3c8cf397631ed104fbe091c4dc62e635 |
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