Malicious PDF — malware analysis report

Static analysis result for SHA-256 b32dc7747c3b02e5…

MALICIOUS

PDF

80.0 KB Created: 2021-09-18 18:52:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: da9cc7f32d001a760151a53fc9aad450 SHA-1: c3e241bbae8494ddc06ae8ecdf03bbf84c73c4a1 SHA-256: b32dc7747c3b02e5d02725c31427399aa27b31d724075220e7ac2a6ea1f8fb55
74 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a high number of external URIs, many of which are hosted on disposable domains. The ML classifier strongly indicates maliciousness. The embedded JavaScript likely facilitates the redirection to these malicious sites, which are designed to deceive users, possibly for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 5

  • 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=traffic+rider+hack+traffic+rider+hack PDF link annotation
    • http://eco-building.cz/UserFiles/File/46200809449.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16142153b2eb88---97642543954.pdfIn PDF document text
    • http://come2menorca.com/images/file/66907016452.pdfIn PDF document text
    • http://hulstcustoms.ru/uploads/files/ririkofurobipiwexagun.pdfIn PDF document text
    • http://candybeauty.vn/upload/files/kowafevigurozig.pdfIn PDF document text
    • http://gold-carsales.com/js/upload/files/31032636043.pdfIn PDF document text
    • http://encino.kopanramen.com/uploads/files/felisa.pdfIn PDF document text
    • http://ip-golubev.ru/ckfinder/userfiles/files/2284169405.pdfIn PDF document text
    • https://larrialdiak.es/files/galeria/files/23675513880.pdfIn PDF document text
    • https://latgalesamatnieki.lv/files/file/bedinowetaxobijafolesuj.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161413140930f8---gefozorutesun.pdfIn PDF document text
    • http://tianlanip.com/filespath/files/20210911182515.pdfIn PDF document text
    • https://foodexgida.com/uploads/files/gefabela.pdfIn PDF document text
    • http://www.almansori-ye.com/almansorifiles/files/zitibumem.pdfIn PDF document text
    • https://safetypadlocks.eu/eurostyl/photos/file/buvejimidasuf.pdfIn PDF document text
    • http://project-lovcen.me/userfiles/file/59894934439.pdfIn PDF document text
    • https://sona3elkhair.com/userfiles/file/vimuvujuradiwajafuvinen.pdfIn PDF document text
    • https://dom-titan.rs/files/fevofelazamitafomubege.pdfIn PDF document text
    • http://ahrestygz.com/userfiles/files/20210917_231131.pdfIn PDF document text
    • http://air-con.ru/upload/files/99843015218.pdfIn PDF document text
    • https://ichapps.peaceofworld.com/ichapps/ckeditor-ckfinder-integration/uploads/files/gibepiloxedaxumopuva.pdfIn PDF document text
    • https://giga-tronics.com/userfiles/files/70694840278.pdfIn PDF document text
    • http://poketomecam.com/uploads/files/23455686712.pdfIn PDF document text
    • http://techniq.ae/admin/uploadfiles/file/34306529473.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.

FilenameKindSourceSize
font_00_sfnt_off0000d57e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD57E 10188 bytes
SHA-256: e8b7dd5d0093930befd9e6bbeebe6a86ba9da6cc53ff6d22c77224a31ecff0eb
font_01_sfnt_off0000ec79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC79 17716 bytes
SHA-256: ba1aaef6879aec825f8590b07b17ef8b7964fe05faea8a79ceab5f8332b34807
font_02_sfnt_off000119da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119DA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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