PDF malware analysis — malicious · 9b3ed7664352815d

MALICIOUS

PDF

84.0 KB Created: 2021-09-09 08:52:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: bf208ee76914d8418d68c7ac1d2e3347 SHA-1: d1d2832fa523d81115883725e9c2e558f59b114f SHA-256: 9b3ed7664352815d45e39fb91b2a3ac6c415621c4c9dd440c73e0440e15a66a4

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various domains, many of which appear to be compromised or disposable hosting. Heuristics indicate a 'link farm' pattern, suggesting the document's primary purpose is to redirect users to potentially malicious sites. The ML classifier and ClamAV detection strongly support a malicious classification, likely related to phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9974

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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://synerhu.ru/uplcv?utm_term=watch+mobile+cricket+live PDF link annotation
- https://fetogram.com/images/upload/files/25061399409.pdfIn PDF document text
- http://cambresisemploi.fr/ckfinder/userfiles/files/86398325946.pdfIn PDF document text
- http://nyitotthaz.hu/userfiles/files/37080287219.pdfIn PDF document text
- https://elminhaj.org/userfiles/file/57632622349.pdfIn PDF document text
- http://www.anclupnapoli.it/userfiles/file/8779056246.pdfIn PDF document text
- http://benthanhsgfarm.net/images/uploads/files/36798485327.pdfIn PDF document text
- http://www.louisefarmersmith.com/admin/ckeditor/ckfinder/userfiles/files/25723690063.pdfIn PDF document text
- http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/161384ead67cc5---20364631605.pdfIn PDF document text
- https://www.icicle-mountaineering.ltd.uk/ckfinder/userfiles/files/3173594007.pdfIn PDF document text
- http://www.videobezopasnost.ru/ckfinder/userfiles/files/polawuveponobesukedun.pdfIn PDF document text
- https://hoangvan.vn/wp-content/uploads/files/jifexuwapev.pdfIn PDF document text
- http://studiogiamberardino.it/userfiles/files/mapagirub.pdfIn PDF document text
- http://angarakshaksecurity.com/userfiles/file/vikanitukijisemugumukuleg.pdfIn PDF document text
- http://www.wcd.com.tw/ezadmin/ckfinder/userfiles/files/47239311043.pdfIn PDF document text
- https://kildevangen.dk/files/gositafe.pdfIn PDF document text
- https://segurodegranizo.ar/noticias/fckeditor/file/16762567627.pdfIn PDF document text
- https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136017c72494---45643437434.pdfIn PDF document text
- http://xn--j1aii.su/userfiles/file/44095699514.pdfIn PDF document text
- http://bigbulkbags.ahmadpackages.com/survey/userfiles/files/vosovep.pdfIn PDF document text
- http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/161383745e97a4---kizudoselanex.pdfIn PDF document text
- https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/jbqu463hs9oind8b7e4tq9lg85/74613158008.pdfIn PDF document text
- http://ronaldtan.nl/images/photo/nisimi.pdfIn PDF document text
- http://flex-link.cn/uploadfiles/files/48895419316.pdfIn PDF document text
- https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/161313efd6f9fa---vetajuzimezojima.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_off0000e331.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE331	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000fb48.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFB48	10516 bytes
SHA-256: `05577ffd343cd9bce520ab891f82e6ef5ad687e3ae6d1e4ce6b9d10fb1e5da37`
`font_02_sfnt_off0001133d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1133D	18060 bytes
SHA-256: `3afa2948758a60708cdcf9a62a8ca910e8908c2d4822b050225b105d27770e26`

Open this report in the interactive analyzer, or submit your own file for analysis.