MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The sample is a PDF file flagged by ML classifiers and ClamAV as malicious. It contains numerous embedded URLs, many of which point to disposable hosting or compromised CMS upload storage, suggesting a link farm or phishing lure. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a pattern of using numerous distinct hosts with a single link each, often with UTM parameters, which is common in SEO poisoning and phishing campaigns. The ML_NYX_PDF_MALICIOUS score of 0.998 further supports its malicious nature.
Machine Learning
- Nyx PDF Classifier malicious score 0.9981
Heuristics 6
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ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTIONClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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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 http://www.azurwelcomeservices.com/userfiles/file/bizuseg.pdf In PDF document text
- http://dansungsala.com/uploads/files/kogaxiluguvigiwekenij.pdfIn PDF document text
- https://hyosungulf.com/uploads/file/64039415886.pdfIn PDF document text
- http://www.xzass.org/ckfinder/userfiles/files/padezolim.pdfIn PDF document text
- https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/ae416620e6c86107a392c8eba6d66dc6/bitijilimilifinurovexego.pdfIn PDF document text
- http://www.jindatunnel.com/up_files/file/fojosujazijukirefuzomikaf.pdfIn PDF document text
- http://pobierzplik.pl/uploads/files/xasusuloguta.pdfIn PDF document text
- http://meimagedance.tw/ufiles/files/jimawutotamevigo.pdfIn PDF document text
- http://net-marketing.hu/images/files/suxajus.pdfIn PDF document text
- http://dentalweek.eu/userfiles/files/69581472255.pdfIn PDF document text
- http://nhadatv.com/webroot/img/files/29005869543.pdfIn PDF document text
- http://xinghui.co/upload/ckimg/files/202109051501468379.pdfIn PDF document text
- http://archi-m.ru/userfiles/file/nidesomegepetixezefozopo.pdfIn PDF document text
- http://lukoilmarine.com/ckfinder/userfiles/files/3587386794.pdfIn PDF document text
- https://luatsuavina.com/userfiles/file/47274347712.pdfIn PDF document text
- https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/b95c572b68a5df6a23a09959f8fb2798/55520750730.pdfIn PDF document text
- https://tranhdaquyhn.com/uploads/news_file/nesit.pdfIn PDF document text
- https://isitekmuhendislik.com/userfiles/file/kiforiz.pdfIn PDF document text
- http://change4best.ru/upload/file/varolekuvomuvodis.pdfIn PDF document text
- http://nuovartea.eu/userfiles/files/lediresomowi.pdfIn PDF document text
- https://telorgabus.com/contents/files/xetitesafi.pdfIn PDF document text
- http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161410429c424e---muniremefi.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=how+to+change+proximity+sensor+settings+in+androidPDF link annotation
- 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_off0000dded.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xDDED | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_01_sfnt_off0000f604.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF604 | 11208 bytes |
SHA-256: 836d28ce720d600a0a819e28b3ddf8264ee15c3f40ef0c9e97e5c85a56f2164c |
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font_02_sfnt_off00010ff1.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x10FF1 | 18416 bytes |
SHA-256: 13fa2ef5df0f40b7a054d93e32af098c2db623e4702f78e4c06ca29f2d040b65 |
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