PDF malware analysis — malicious · 17aa02c87b02c0bb

MALICIOUS

PDF

77.0 KB Created: 2021-09-18 11:27:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20

MD5: 2cd47d504e05538a3f3fc46514a7ff45 SHA-1: c875735a280f2d1caf2b234cbcc67d7015967a75 SHA-256: 17aa02c87b02c0bb7de0686298626f8e593af7ff21cdaa734e453aa48ba4c577

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, many of which are hosted on disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common technique for initiating malicious actions within PDF documents.

Machine Learning

Nyx PDF Classifier malicious score 0.9943

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://pistant.ru/uplcv?utm_term=torch+light+apk PDF link annotation
- http://kryotherapie.net/neu/userfiles/file/mapuposepujoguzutetuvegi.pdfIn PDF document text
- http://ctnphrae.com/ckfinder/userfiles/files/pujurojojepofozadovaxezaj.pdfIn PDF document text
- https://onthespothousing.com/userfiles/file/xisodapi.pdfIn PDF document text
- http://bndweb.nl/upload/files/gigibisaz.pdfIn PDF document text
- http://wwsm-us.com/files/file/zakigolibokiber.pdfIn PDF document text
- http://faptvmedia.com/userfiles/file/wetonimem.pdfIn PDF document text
- https://jbdclothiers.net/emailer/userfiles/file/fukovowawoko.pdfIn PDF document text
- https://bloc-immo.com/images/wutumokid.pdfIn PDF document text
- http://fosterfreezesantarosa.com/uploads/files/zodewezufiwemirosora.pdfIn PDF document text
- http://weiken-rc.com/upload/files/karazenedonivapujogafin.pdfIn PDF document text
- https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/161309330ee18e---kamevasarexafiwotujajo.pdfIn PDF document text
- https://designclarf.it/file/gotakef.pdfIn PDF document text
- https://strechybenesov.cz/content/xemelewodozewage.pdfIn PDF document text
- https://b2b-intelligence.it/uploads/file/sikotowupumarojetopija.pdfIn PDF document text
- http://romangruszecki.com/uploaded/file/32074359755.pdfIn PDF document text
- http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/161397ac0bf1db---wutot.pdfIn PDF document text
- http://www.jindatunnel.com/up_files/file/62915220191.pdfIn PDF document text
- https://zweefvlieg.net/userfiles/file/88014991689.pdfIn PDF document text
- http://kehlux.lu/userfiles/files/69051997789.pdfIn PDF document text
- http://around-sicily.net/userfiles/file/46712765088.pdfIn PDF document text
- https://oceanflowerhotel.com/uploads/image/files/puruxogutusuzugugi.pdfIn PDF document text
- https://www.ftha.org/admin/ckfinder/userfiles/files/12332387467.pdfIn PDF document text
- http://gongotour.com/FileData/ckfinder/files/20210905_F27CF9B343A219EB.pdfIn PDF document text
- https://autopits-directo.migrupoq.com/ckfinder/userfiles/files/92360774861.pdfIn PDF document text
- https://www.barefoothoa.com/webroot/js/ckfinder/userfiles/files/19275562280.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_off0000c437.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC437	10304 bytes
SHA-256: `2a4c85c5f93c07a3233b7a02ccc282de023d3c4a0c00b91209b25719f2a8e99a`
`font_01_sfnt_off0000db92.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDB92	19488 bytes
SHA-256: `96caaa63d4ef74fe8356b4859687feb26d3a28fde594ba81082d7a018360c61c`
`font_02_sfnt_off00010e69.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10E69	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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