MALICIOUS
196
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The sample is identified as malicious by ML classifiers and ClamAV, with heuristics indicating it's a link farm and a browser extension installation lure. The document body is heavily obfuscated, but the presence of numerous URLs pointing to potentially compromised or disposable hosting suggests a phishing or malware distribution attempt. The primary goal appears to be tricking the user into downloading and installing a malicious browser extension or update.
Machine Learning
- Nyx PDF Classifier malicious score 0.9981
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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Browser extension / update installation lure high SE_BROWSER_INSTALL_LUREDocument tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
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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://coretry.ru/uplcv?utm_term=what+is+the+importance+of+heterotrophs+and+decomposers+in+an+ecosystem PDF link annotation
- http://kht.civilkozpont.hu/uploads/file/lutezizijexo.pdfIn PDF document text
- http://centroolosprato.it/userfiles/files/2009420510.pdfIn PDF document text
- http://ccsl.asia/files/kafunivutidowavaworuzuzo.pdfIn PDF document text
- http://numere-mopede.ro/mm/file/85648281959.pdfIn PDF document text
- http://allergya.news-read.com/upload/files/6114186847.pdfIn PDF document text
- https://www.luxboss.com/ckfinder/userfiles/files/17273674361.pdfIn PDF document text
- https://quangcaowebsite.vn/uploads/files/55567733712.pdfIn PDF document text
- https://etest.vn/app/webroot/uploads/files/3046732390.pdfIn PDF document text
- http://buyo-g.net/userfiles/file/80724911698.pdfIn PDF document text
- http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142b25e1f6af---wakowijadaforevonefukob.pdfIn PDF document text
- http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/161322fe7043d2---43057725589.pdfIn PDF document text
- http://bartuceviri.com/userfiles/file/bekutoza.pdfIn PDF document text
- http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615890466262b---zesegopofawawitis.pdfIn PDF document text
- http://hebammenglueck.de/ckfinder/userfiles/files/pujofidugajazaxatax.pdfIn PDF document text
- http://runo34.ru/attachments/file/jegasaxatarulogil.pdfIn PDF document text
- http://alacarte-husum.de/userfiles/file/76807101258.pdfIn PDF document text
- https://bakotech.at/uploads/ckeditor/files/ramogivoxo.pdfIn PDF document text
- http://fusen-es.info/yamituki-n/uploads/files/22425652851.pdfIn PDF document text
- http://learnazia.com/fck/imagesfile/giragarired.pdfIn PDF document text
- http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/676613876e77273fdd907d65841a1509/pavenunipudegilamafojetu.pdfIn PDF document text
- http://happyland-nsk.net/ckfinder/userfiles/files/34273656558.pdfIn PDF document text
- https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/rn88c0mn2g6chn0v86b6svlo23/jujizatejuvanipu.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_off0000dfc3.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xDFC3 | 10948 bytes |
SHA-256: 0739f9faa88d737683eff8a826a7d2f44320f2be1e5f25d198ccabd9fdc20ad1 |
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font_01_sfnt_off0000f906.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF906 | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_02_sfnt_off00011118.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x11118 | 18200 bytes |
SHA-256: ffd2b738158e9a8221fa1966e64a860223aea58ff5f8396f296c08d6a6245236 |
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