Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2a872c9366cb655…

MALICIOUS

PDF

81.1 KB Created: 2021-09-23 00:54:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 29665ef59bbad6573febb4de8898c5d3 SHA-1: ad3f52f131add1bb56f70289a39df03f06cb7ac3 SHA-256: b2a872c9366cb655df12fd0c50dc8adb7187d78c0d122f9e1cfcc362d61c4610
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and multiple external URIs, indicating it is designed to redirect users to a link farm. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests the purpose is to manipulate search engine results or distribute further malicious content. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://salondumariagededijon.com/userfiles/file/juxevox.pdf In PDF document text
    • http://vitacanes.com/uploads/files/bozogupapeduxojodopoja.pdfIn PDF document text
    • http://zygzak.eu/foto_dane/wysiwyg/File/72965852190.pdfIn PDF document text
    • http://hagelkonzept.de/userfiles/file/68236541908.pdfIn PDF document text
    • http://hotelclinton.it/userfiles/files/lezovunixasivar.pdfIn PDF document text
    • http://club-integra.ru/userfiles/file/44775842856.pdfIn PDF document text
    • http://wgadget.com/file_media/file_image/file/xavosubumawubizepisulaxu.pdfIn PDF document text
    • http://maremio.ru/admin/ckfinder/userfiles/files/76129889281.pdfIn PDF document text
    • http://supermarketdv.ru/files/file/87481993802.pdfIn PDF document text
    • http://vers-ma.de/userfiles/file/gepagepovodofonulejijowud.pdfIn PDF document text
    • http://xn--80aa5alfu.kz/file/93789764768.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614223b9d11e0---75464614963.pdfIn PDF document text
    • https://pragatitic.org/ckfinder/userfiles/files/kisuxesulobowaxefegotopu.pdfIn PDF document text
    • http://bcslaw.hu/admin/fck_upload/file/13181896688.pdfIn PDF document text
    • http://ngoinvest.com/uploads/ckfinder/files/33961695794.pdfIn PDF document text
    • http://mgtuae.com/uploads/file/bikigatinisarazowuneza.pdfIn PDF document text
    • http://montpellier-businessplan.com/mbp/upload/images/images/upload/ckfinder/12564824460.pdfIn PDF document text
    • http://bestpokeya.com/uploads/files/66329771339.pdfIn PDF document text
    • http://konferencii.org/js/ckfinder/userfiles/files/mizedejeto.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/jrdjpbru5kmq9a22gfv4rpj9p7/25629128289.pdfIn PDF document text
    • http://cetis156.neutronds.com/assets/js/ckfinder/userfiles/files/wodazenalavapuvadaliwapa.pdfIn PDF document text
    • https://bczenekar.hu/files/file/bobewojininaboxaxov.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=how+to+fix+screen+overlayPDF link annotation
    • 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_off0000d80c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD80C 18000 bytes
SHA-256: 95859450d800109612bb471f3ba1e239fc591f924f8e5d6f60a3e284664868ec
font_01_sfnt_off000106a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106A8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011ebf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EBF 10688 bytes
SHA-256: e6bec4fb30714d0af4856377f58f32766704cd3217d04bc802ea491c7d8e897a

Open this report in the interactive analyzer, or submit your own file for analysis.