Malicious PDF — malware analysis report

Static analysis result for SHA-256 60e06e91a78eb3a5…

MALICIOUS

PDF

72.8 KB Created: 2021-09-16 17:32:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 369d3aa00dafdd2ad13545c69ea7ead6 SHA-1: f28a1d27234cf5a272775709fde62cc17505af38 SHA-256: 60e06e91a78eb3a5c7a422127d78a6528dad8cc50d2cc99e9042183841b9c5ff
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of numerous external URIs and its classification as a link farm on disposable hosting strongly suggests a phishing or malware distribution attempt. Although no scripts were extracted, the PDF structure and embedded URLs indicate it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • 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.
  • 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://wastran.ru/uplcv?utm_term=the+domain+of+inverse+tangent+function+is PDF link annotation
    • https://laplacedesstores.com/upload/file/61985981182.pdfIn PDF document text
    • http://dep14kirov.ru/userfiles/file/vasinovitomefanuti.pdfIn PDF document text
    • http://xn--2e0b95unoa536adofm5h.com/userfiles/file/jebogafirekabam.pdfIn PDF document text
    • https://ags-car.60km.com/upload/files/41044707434.pdfIn PDF document text
    • http://montesantangelo.it/files/files/jezazepatusorutawumupato.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16142c108d02f8---tejigejurosojowi.pdfIn PDF document text
    • http://youngshiny.com/userfiles/file/1631139538.pdfIn PDF document text
    • http://mspchicagolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/satajobababavore.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139701f7ff56---silataj.pdfIn PDF document text
    • http://vers-ma.de/userfiles/file/gufaturavo.pdfIn PDF document text
    • https://pezenasenchantee.fr/userfiles/file/bibuzuz.pdfIn PDF document text
    • http://lycee-elm.info/userfiles/file/laditugabivesobirul.pdfIn PDF document text
    • http://iltorg.ru/upload/file/rilosunenerulolasolizixir.pdfIn PDF document text
    • https://goodline.by/userfiles/file/89752363954.pdfIn PDF document text
    • https://psychotherapie-coeppicus.ch/upload/file/7367962730.pdfIn PDF document text
    • http://dison.cn/filespath/files/20210907025819.pdfIn PDF document text
    • https://nbc.com.vn/ckfinder/userfiles/files/95740587089.pdfIn PDF document text
    • http://neogmbh.de/www/sites/default/files/userfiles/file/dikogutuvotenid.pdfIn PDF document text
    • http://hurtglass.pl/upload/file/jeniwo.pdfIn PDF document text
    • https://usgcambodia.com/userfiles/file/38529018514.pdfIn PDF document text
    • http://arisutour.com/ckupload/files/73043836972.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_off0000b733.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB733 17440 bytes
SHA-256: f38deb0719a8f172bdef3ec4ae63eab838f727ec261a4981d4a3c3a6931380ee
font_01_sfnt_off0000e4b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4B0 11004 bytes
SHA-256: 7505ad7569897d18822f1a31e177a69671f55dd46678f32062634bf05a031883
font_02_sfnt_off0000fdf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDF3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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