PDF malware analysis — malicious · d065f30db3085c5a

MALICIOUS

PDF

83.6 KB Created: 2021-09-12 05:53:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: 47d30c7557420002579f4c6611e6bd1b SHA-1: 1ec5225f10fc236f7f1d220f8e6fa3e15dd136bc SHA-256: d065f30db3085c5a438c1f9893a796d6c6b97b15f0e40d8e359434762e5c2eeb

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs pointing to various domains, suggesting a phishing or link-farming operation. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this, indicating the PDF is designed to distribute links across disposable hosting. No scripts were extracted, but the presence of external URIs and the overall structure point towards a phishing attack.

Machine Learning

Nyx PDF Classifier malicious score 0.9974

Heuristics 5

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

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://freshchannels.com/home/sites/freshchannels/public_html/ckfinder/userfiles/files/rurebikuxovivoru.pdf In PDF document text
- http://www.groupementpecheduloir.com/ckfinder/userfiles/files/48920198261.pdfIn PDF document text
- https://iuoshili.com/upload/users/files/77283127469.pdfIn PDF document text
- http://pensjonatagat.pl/userfiles/file/16624879816.pdfIn PDF document text
- http://bfttacg.marketsearching.com/upload/files/32386666854.pdfIn PDF document text
- https://kamionosnyelvlecke.hu/userfiles/file/50984702917.pdfIn PDF document text
- https://vicotelecom.vn/static/source/images/file/96750730902.pdfIn PDF document text
- https://interference.ajoda.eu/userfiles/files/xiburifomifek.pdfIn PDF document text
- http://istihdamhaberleri.com/upload/ckfinder/files/78152060739.pdfIn PDF document text
- http://szkolaprywatnaleszno.pl/userfiles/file/nomafurirub.pdfIn PDF document text
- http://immobiliareborghi.com/userfiles/files/rewuvipivozep.pdfIn PDF document text
- http://edeins.com/userfiles/file/wutugebofojodowaxufeza.pdfIn PDF document text
- http://metallpress.ru/files/fosuvuxasewoxo.pdfIn PDF document text
- https://goldfieldssanddrags.com.au/ckfinder/userfiles/files/mujiteruvufidusibix.pdfIn PDF document text
- http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613b20814fb86---83763793290.pdfIn PDF document text
- http://gyndoktors.de/ckfinder/userfiles/files/5079087864.pdfIn PDF document text
- http://onroerendgoedindex.nl/images/uploads/gukulabinejevatexatage.pdfIn PDF document text
- https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/022f9effc7235dc87a28cb16bd1577cb/xudemomogiwovixenowuvitu.pdfIn PDF document text
- https://imotrading.com/images/userfiles/faragowikizeniwo.pdfIn PDF document text
- http://zeminyerkaplama.com/upload/ckfinder/files/wujaru.pdfIn PDF document text
- https://www.casestilistas.es/ckfinder/userfiles/files/16807484938.pdfIn PDF document text
- http://www.cavice.fi/tiedostot/files/fekifoz.pdfIn PDF document text
- https://florerialafloresta.com/ckfinder/userfiles/files/zixidataxovifuletagavatem.pdfIn PDF document text
- http://www.moyekolodin.com/files/67960939049.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=gta+iii+download+apk+obbPDF 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_off0000e3b1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE3B1	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000fbc8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFBC8	10344 bytes
SHA-256: `f78dbeb93138bd5461d4d68a157f06853a3e55d13bcc9f901afa33d5931ace99`
`font_02_sfnt_off00011300.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11300	17748 bytes
SHA-256: `eb32a1deca7f8eb74e5a4e56554121ffcb785d1b0d3d4072dee65ea4bf731b55`

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