PDF malware analysis — malicious · d729e14854db1155

MALICIOUS

PDF

79.7 KB Created: 2021-09-18 22:58:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 00a98bc043bf24821791c87b31575c39 SHA-1: 068b2ca2d7643d86b9991849e6a2c904f7dfc457 SHA-256: d729e14854db115593831c835b40e493e05a0bdf3babf5f778b84e0f62effc94

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The sample is a PDF file containing embedded JavaScript, which is a common technique for executing malicious code. The PDF also features a large number of external URIs, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially malicious content. ClamAV and ML classifiers also flagged this file as malicious, specifically as a phishing trojan.

Machine Learning

Nyx PDF Classifier malicious score 0.9953

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
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://garglob.ru/uplcv?utm_term=among+us+lock+screen+apk PDF link annotation
- http://sirindhorn.net/upload/File/xovugebilirodoxa.pdfIn PDF document text
- http://areaengineeringsrl.eu/userfiles/files/koderamewenaj.pdfIn PDF document text
- https://civilkontroll.hu/uploads/file/51430106108.pdfIn PDF document text
- https://eric-parnes.com/ckfinder/userfiles/files/wemasijupevikaruzuviz.pdfIn PDF document text
- http://vanillasky-ch.com/images/files/dirodiz.pdfIn PDF document text
- http://www.tm-africa.com/beta/public/uploads/cms_filescms_files/23426772925.pdfIn PDF document text
- https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613f225ab9803---zulowadamewabi.pdfIn PDF document text
- http://heninrealty.com/userfiles/files/pemexaxadunorutipagawa.pdfIn PDF document text
- http://josephfellerlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fizodokibevu.pdfIn PDF document text
- http://calisnt.com/uploads/files/sebuwozomafi.pdfIn PDF document text
- http://arcadia-fitness.es/userfiles/file/3759793977.pdfIn PDF document text
- http://metrominicabs.com/survey/userfiles/files/xedavubotes.pdfIn PDF document text
- http://tipkeo.com/js/ckfinder/userfiles/files/97453565534.pdfIn PDF document text
- https://www.whoamiandwhyamihere.com/ckfinder/userfiles/files/fatizonuxazewe.pdfIn PDF document text
- http://hosungtour.net/FileData/ckfinder/files/20210917_2CE60B67E66101A8.pdfIn PDF document text
- http://artin-intranet.com/ckupload/files/82870201666.pdfIn PDF document text
- http://michellenevinracing.com/FCKeditor/file/tamotupivavixuwifaxejitak.pdfIn PDF document text
- https://mclandpin.com/calisma2/files/uploads/72580789655.pdfIn PDF document text
- http://fanti-fitness.pl/uploads/assets/file/senabimiratawaf.pdfIn PDF document text
- http://www.tractortools.cz/ckfinder/userfiles/files/didusijulabiw.pdfIn PDF document text
- https://mamalight.net/business_school/uploads/file/13567617917.pdfIn PDF document text
- https://digireg.si/upload/dudotudukunarazimi.pdfIn PDF document text
- http://smflow.in/admin/uploads/file/panutavuwezoxoliduwituxo.pdfIn PDF document text
- http://i-akparat.kz/ckfinder/userfiles/files/roxawipapujozapuzepujuxom.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_off0000cd7e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCD7E	19588 bytes
SHA-256: `d659917ca481281fb071ea415a5fa41951ed6dfb9066b8bb9bd5dcb67967083f`
`font_01_sfnt_off000100b8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x100B8	10700 bytes
SHA-256: `ab53a58b638b1f2c68450e5cf4ad412be46d0319aaa2379fd3236fc11b7b5397`
`font_02_sfnt_off00011956.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11956	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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