PDF malware analysis — malicious · e7001eb85d3e81b3

MALICIOUS

PDF

83.7 KB Created: 2021-09-20 04:15:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: 560c2b65a26e01bc56321488e3e7f1e2 SHA-1: 9fdbdc1dee1798c7e5d37aa46803340c875dfb97 SHA-256: e7001eb85d3e81b3ba89e64bec6559b822857d205fa343224d7624b20ecbfbd4

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The sample was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains embedded JavaScript and multiple external URIs, suggesting it's designed to redirect users to potentially harmful websites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports that the PDF is used to host numerous links on disposable domains, likely for phishing or distributing further malware.

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
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.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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://queure.ru/uplcv?utm_term=adopt+me+mod+apk+all+pets PDF link annotation
- https://vibangthuaphatlai.net/uploads/files/57071983912.pdfIn PDF document text
- https://protradingindia.net/userfiles/file/82034641723.pdfIn PDF document text
- https://optical-axis.com/uploads/files/202109121122483215.pdfIn PDF document text
- https://egokituz.eus/files/galeria/files/nenuni.pdfIn PDF document text
- http://henghuitong.com/jingkelun/userfiles/files/20210918135802.pdfIn PDF document text
- http://horizonpestservices.com/userfile/zukejujabadinuxevibab.pdfIn PDF document text
- http://hit-air.pro/ckfinder/userfiles/files/jotifurorabikawosuxut.pdfIn PDF document text
- https://przygodanaukrainie.pl/admin/ckfinder/userfiles/files/zufotixubudemulojiwura.pdfIn PDF document text
- http://kppzp.pl/userfiles/file/92080779319.pdfIn PDF document text
- http://nyett.hk/uploads/news/files/24549336789.pdfIn PDF document text
- https://pmcp-avac.com/files/upload-ckfinder/files/97614221944.pdfIn PDF document text
- http://whitedwarf.ru/public/images/ckfinder/files/rebun.pdfIn PDF document text
- https://esterkins.de/ckfinder/userfiles/files/38368674103.pdfIn PDF document text
- https://gabinetpro.pl/kosmetyczka/krakow/files/xajuzipigolotilasonir.pdfIn PDF document text
- https://semangkabiji.com/contents/files/18092010731.pdfIn PDF document text
- https://gullyracing.it/admin/ckfinder/userfiles/files/90562246383.pdfIn PDF document text
- http://yuqiaohome.com/uploads/files/202109172230592735.pdfIn PDF document text
- http://slkuang.com/v15/Upload/file/2021916155557985.pdfIn PDF document text
- http://www.saveurspoitoucharentes.com/admin/ckfinder/userfiles/files/65413200238.pdfIn PDF document text
- http://progettocecinacuore.it/writable/public/userfiles/file/jatadusutop.pdfIn PDF document text
- https://enilubricant.hoakhanh.vn/uploads/image/files/fagosomaruvinuzu.pdfIn PDF document text
- http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/161411912596e6---navudamudux.pdfIn PDF document text
- http://zartmobilia.com/userfiles/file/20210918063441.pdfIn PDF document text
- https://grupo.iberia.com/js/ckfinder/userfiles/files/51022619392.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_off0000e1e7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE1E7	18356 bytes
SHA-256: `4cb3b5bcfcf407c71258232a5b547b2b7a9e0bea641cd2bd2fd3a39a2bca5a42`
`font_01_sfnt_off000111e5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x111E5	10328 bytes
SHA-256: `83e1ee1b666b6ed4ec2df3c865004c8f322b7dd64f8c155a3b54e4f1abab01d5`
`font_02_sfnt_off0001294a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1294A	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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