PDF malware analysis — malicious · f87b81142a64b508

MALICIOUS

PDF

82.4 KB Created: 2021-09-21 07:54:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-17

MD5: 1e9acf9657a42cbf58084b18aeb3a556 SHA-1: c3ccd806ce901f58acb3b4576f223d85f4f34908 SHA-256: f87b81142a64b50850ffa7d975958487f5804f08b40598128c07d61867ba0b83

156 Risk Score

Machine Learning

Nyx PDF Classifier malicious score 0.9972

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM

PDF 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.
Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small 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.
External URI info PDF_URI

PDF contains an external URL action
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The 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.
Embedded URL info EMBEDDED_URL

One 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://h1t-urlaurora1-turbo.com/contents/files/93110298584.pdf In PDF document text
- http://saimiri.name/upload/file/pisifegoziwenabawujomomeg.pdfIn PDF document text
- https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/161455d08e00fc---99041984218.pdfIn PDF document text
- http://le-lemniscus-incandescent.fr/ckeditor/upload/files/gogavuzogog.pdfIn PDF document text
- http://yogathoitrang.com/quangbasanpham/app/webroot/upload/image/files/39045189565.pdfIn PDF document text
- https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/161491aba4139e---83882563733.pdfIn PDF document text
- http://fukaofoods.tw/uploads/files/202109031307198035.pdfIn PDF document text
- http://azbuka-d.ru/ckfinder/userfiles/files/64664820305.pdfIn PDF document text
- http://di-tech.kr/fckeditor/userfiles/file/zorusugexepinenusizotoke.pdfIn PDF document text
- http://curry-box-deluxe.de/userfiles/file/tajadogijuxupexedejenat.pdfIn PDF document text
- http://noxsun.com/jingkelun/userfiles/files/20210912235247.pdfIn PDF document text
- https://2winit.com/Files/files/2747702398.pdfIn PDF document text
- http://creativecoms.net/userfiles/file/ririrokoxolebadunavifuxi.pdfIn PDF document text
- https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/233bb7551ffe97e9d320e6a8e79f7580/86190381611.pdfIn PDF document text
- http://www.me.ntou.edu.tw/ckfinder/userfiles/files/20210903_115608.pdfIn PDF document text
- https://yourdentist.ro/app/webroot/files/userfiles/files/dekifipifilisanifowogezef.pdfIn PDF document text
- http://skene.es/userfiles/file/56478300095.pdfIn PDF document text
- https://masukpt2.com/contents/files/kudunurutexilemunas.pdfIn PDF document text
- http://delfosventures.com/userfiles/files/wudukevozezeraf.pdfIn PDF document text
- https://medarbindia.org/ckfinder/userfiles/files/42011226382.pdfIn PDF document text
- http://milkexim.ru/imgeditor/file/71801655991.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=13+principles+of+think+and+grow+rich+pdfPDF 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_off0000de92.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDE92	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000f6a9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF6A9	11204 bytes
SHA-256: `daa207436761a6f0fb3a6668e59b3483b2f5e01b1993b6b744e6cda04869ca38`
`font_02_sfnt_off000110ab.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x110AB	17140 bytes
SHA-256: `3633223f1ad10182e3b7144922c3ce327425d884764ca55bbe8ad446fcebff55`

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