Malicious PDF — malware analysis report

Static analysis result for SHA-256 791263cae22b0c17…

MALICIOUS

PDF

71.9 KB Created: 2021-09-15 11:07:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: a1aaa83b8de2eb4982ca4fcc3ff3c150 SHA-1: bab3e36db1abeda6dbc76bfb419f92cda0d6cb6e SHA-256: 791263cae22b0c1721cd31ee28c93b782156f9d0603779ada3b2c9206397e05a
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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://crewmak.ru/uplcv?utm_term=valentines+day+free+porn PDF link annotation
    • http://debrecen.varosom.hu/userfiles/files/41509199461.pdfIn PDF document text
    • http://avvocatoandreabruschi.it/userfiles/files/jiwewipanego.pdfIn PDF document text
    • http://jolanyee.com/upload/files/202109121705591170.pdfIn PDF document text
    • http://ghefootmassage.com/fckeditor_userfiles/file/bedebefujijutusopumo.pdfIn PDF document text
    • http://tw-tms.com/uploadpic/xw/files/32419489607.pdfIn PDF document text
    • https://lensprovn.com/ckfinder/userfiles/files/larodomodopabasepalubon.pdfIn PDF document text
    • http://bdpq.hungminhits.com/files/uploaded/files/74606618432.pdfIn PDF document text
    • http://studiotecnicopinto.it/userfiles/files/37577121697.pdfIn PDF document text
    • http://benthanhsgfarm.net/images/uploads/files/91075717040.pdfIn PDF document text
    • https://mgs-on-track.com/uploads/misc/files/vedexawusudadoke.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1613c004e6aef8---rebejalazotakime.pdfIn PDF document text
    • https://0a3exp.com/upfiles/editor/files/87784827010.pdfIn PDF document text
    • https://bloomland.com/sites/bloomland.com/files/vixokipomipogoposizoxixad.pdfIn PDF document text
    • http://veoguidecostarica.com/ci/userfiles/files/xuzibefupujujivoxetuno.pdfIn PDF document text
    • http://corporatiegids.nl/uploads/files/1426928618.pdfIn PDF document text
    • http://wksystems.net/HotelEstimator/userfiles/file/49594296025.pdfIn PDF document text
    • https://texigo.tw/upfile/files/2021/09/07/84202514446.pdfIn PDF document text
    • http://bajajsports.com/userfiles/file/19813268100.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/161409c8ec2ea6---11313263404.pdfIn PDF document text
    • https://magazinul-de-instalatii-sanitare.ro/app/webroot/files/userfiles/files/44177897118.pdfIn PDF document text
    • https://keyword-lda.pt/site/upload/file/zemozubunexojedeboz.pdfIn PDF document text
    • http://kperrylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jirima.pdfIn PDF document text
    • http://geostudio.eu/userfiles/files/36101654936.pdfIn PDF document text
    • https://sandp-engineering.com/ckfinder/userfiles/files/mebowetope.pdfIn PDF document text
    • http://kiavysocina.cz/UserFiles/File/23045767228.pdfIn PDF document text
    • http://vnationwide.com/userfiles/files/motizobijegajorixetuz.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_off0000b689.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB689 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ce9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE9B 16712 bytes
SHA-256: ae3054746924e57211e3ba4372d7e493f09f9252ec4241eef69fe1276f62ea2a
font_02_sfnt_off0000f9e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9E3 10576 bytes
SHA-256: bd4be3dbec69141fb05336a9b09c1512c4b427427ada59acb98992250769645f

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