MALICIOUS
116
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The ML classifier strongly indicated maliciousness, supported by heuristics identifying the PDF as a link farm pointing to compromised CMS uploads and disposable hosting. The document body, though heavily obfuscated, likely contains instructions or lures related to the embedded URLs. The presence of numerous links to potentially compromised or disposable domains suggests an attempt to distribute further malicious content or facilitate phishing.
Machine Learning
- Nyx PDF Classifier malicious score 0.9985
Heuristics 6
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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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QR-code redirect lure medium SE_QR_LUREDocument instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
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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://snbedu.com/uploadfile/file///2021090910213250.pdf In PDF document text
- https://3eyamaichi.com/upload/ckfinder_temp/files/20210905025333.pdfIn PDF document text
- https://www.fyna.com.au/application/third_party/ckfinder/userfiles/files/lunowizo.pdfIn PDF document text
- https://rafaellopezehijo.com/upload/files/70634137423.pdfIn PDF document text
- https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/r9mfb0gkkdltc5h450sb2otm05/lagelelumezonizev.pdfIn PDF document text
- http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141738c8d52d---zosuwewabajasufosed.pdfIn PDF document text
- http://iact2001.com/userData/board/file/rexerewelunodipefewugoku.pdfIn PDF document text
- http://langeline.com/ckeditor/upload/files/nefidonaxunopinanununibeg.pdfIn PDF document text
- http://swhwsolution.it/ckeditor-ckfinder-integration/uploads/files/45355188604.pdfIn PDF document text
- https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/2s771qkii3s957mc079dh0ato4/88850456089.pdfIn PDF document text
- https://ibrahimkoc.com/images/Media/files/18876645500.pdfIn PDF document text
- http://maurovalleferroarchitetto.eu/userfiles/files/vinezufuzulasofar.pdfIn PDF document text
- https://idosekotthonaveresegyhaz.hu/files/files/zejojubufifawi.pdfIn PDF document text
- https://gites-les-bardots.com/userfiles/file/48215766948.pdfIn PDF document text
- http://halmar.info/userfiles/file/96136632535.pdfIn PDF document text
- http://chi-kara.net/userfiles/file/kexeje.pdfIn PDF document text
- https://gulf-rope.com/images/bulk_images/files/69502799013.pdfIn PDF document text
- https://www.zochrot.org/ckfinder/userfiles/files/lutirobiwidirasoketo.pdfIn PDF document text
- http://www.medic-pneumolog.ro/fisiere/file/180144311.pdfIn PDF document text
- https://polresseluma.com/assets/ckfinder/core/connector/php/uploads/files/14372473742.pdfIn PDF document text
- https://anmoul.com/userfiles/file/94006846104.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=barcode+scanner+javaPDF 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_off0000bf57.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xBF57 | 16832 bytes |
SHA-256: d15cff6d28a1e168cfc051d927d7e1327f0e5c2bdb881ec5cf776428a5c9190a |
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font_01_sfnt_off0000eac0.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xEAC0 | 10376 bytes |
SHA-256: 9b291f9d1f0ee58479fe4abc82e80ba8a74af1c26a757173305844188aa746d7 |
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font_02_sfnt_off00010265.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x10265 | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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