PDF malware analysis — malicious · 2e4e19080d9b28f4

MALICIOUS

PDF

72.8 KB Created: 2021-09-18 01:02:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: e7005062b5ce15ec5436275d00a634c2 SHA-1: 420783b6fa5f20dc2c2bb87225d6e2fe53532843 SHA-256: 2e4e19080d9b28f4a28ba342944bec69eb9f2fef00743628e0d548dd03b66702

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as malicious by ClamAV and an ML classifier, and exhibits characteristics of a link farm. It contains an embedded JavaScript stream and multiple external URIs pointing to various domains, suggesting an attempt to redirect users to potentially harmful content. The presence of JavaScript indicates an intent to execute code within the PDF viewer.

Machine Learning

Nyx PDF Classifier malicious score 0.9973

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://krisoc.ru/uplcv?utm_term=worst+flirting+lines PDF link annotation
- http://makairways.in/home/makairways2017/public_html/dowalumniusa/ckfinder/userfiles/files/44585784134.pdfIn PDF document text
- http://hoitruyengiaocodocvietnam.com/uploads/image/files/vadezevedobimiwikodunax.pdfIn PDF document text
- https://petandpuppies.com/userfiles/file/gebefawexisawosirubutab.pdfIn PDF document text
- https://angem.fr/userfiles/file/xugivebojonaperarovi.pdfIn PDF document text
- http://asja-doll.ru/userfiles/file/86316862790.pdfIn PDF document text
- http://sakesushilakehavasu.com/uploads/files/bidalafivuf.pdfIn PDF document text
- http://veiligheidssloten.nl/ckfinder/userfiles/files/90285892253.pdfIn PDF document text
- http://www.jasolasia.com/image/upload/File/62344111170.pdfIn PDF document text
- http://vin-baietii.ro/ckfinder/userfiles/files/64986142653.pdfIn PDF document text
- http://crimesla.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/25083827667.pdfIn PDF document text
- https://jpjplumbingandheating.com/FCKeditor/file/repagelikadisomusu.pdfIn PDF document text
- http://eia-edu.com/userfiles/file/24137702937.pdfIn PDF document text
- http://historico.uts.edu.co/portal/app/ckfinder/userfiles/files/wejara.pdfIn PDF document text
- http://etcpremium.com/userfiles/files/sidejupegadowasob.pdfIn PDF document text
- http://sonnenheizung.ch/fckeditor/editor/images/file/foxakifuje.pdfIn PDF document text
- https://eghamatkade.com/basefile/eghamatkadecom/files/tetanubimanunuzurukuse.pdfIn PDF document text
- https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d3268e6071---63876489084.pdfIn PDF document text
- https://spotiverify.com/ci/userfiles/files/79088908027.pdfIn PDF document text
- http://akiisushi.com/uploads/files/234196430.pdfIn PDF document text
- http://equipociclistaugeraga.com/ciclistas/userfiles/file/kusojeluwajiwo.pdfIn PDF document text
- https://kamwalibais.com/userfiles/file/loviwijazus.pdfIn PDF document text
- https://imad0c0.com/js/ckfinder/userfiles/files/93287803391.pdfIn PDF document text
- https://shih-tzu.ro/files/file/89799531486.pdfIn PDF document text
- https://prolocolidodisavio.org/ckfinder/userfiles/files/20204735953.pdfIn PDF document text
- https://baoyi-chuck.com/ckfinder/userfiles/files/98025075185.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_off0000bcea.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBCEA	16320 bytes
SHA-256: `f15674e450cf43eff3e0950ceb40dfe720f521dfbafd636414fb99be2da0466d`
`font_01_sfnt_off0000e684.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE684	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000fe9b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFE9B	10220 bytes
SHA-256: `8eb94e6e9fbfd15cb395226dfc669e5c32628a7d268bb31c333f541741337d84`

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