Malicious PDF — malware analysis report

Static analysis result for SHA-256 e39a0be84c346083…

MALICIOUS

PDF

86.7 KB Created: 2021-09-08 20:46:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 005e932efc71cd854c56422b736f0896 SHA-1: 85dc2ff049cf894af413a4e100a22b33b4a30e95 SHA-256: e39a0be84c346083c6f5b4cf5bfcbc650e9ee20479c759edcd909d068eff918f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as a malicious PDF by ClamAV and an ML classifier. It contains a large number of external URIs pointing to disposable domains, indicating a link farm or phishing lure. The PDF's structure and the presence of numerous links suggest it is intended to redirect users to malicious websites, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://nomylo.ru/uplcv?utm_term=kubota+d722+diesel+engine+parts+manual PDF link annotation
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161353544449e7---xebetefabodepofili.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/16133f44e27a2a---83069244572.pdfIn PDF document text
    • https://uat-tunisia.com/userfiles/file/patelibelovobevujesod.pdfIn PDF document text
    • http://newo.ru/files/files/67741179817.pdfIn PDF document text
    • http://eiak.org/upload/editor/files/wekiripe.pdfIn PDF document text
    • https://goacetours.com/ckfinder/userfiles/files/sikuxugajuximobitiwupex.pdfIn PDF document text
    • http://talk200.com/admin/admin/uploadfiles/file/8190184899.pdfIn PDF document text
    • https://livre-art.com/ckfinder/userfiles/files/fewak.pdfIn PDF document text
    • https://hopclickhospitality.com/scgtest/team-explore/uploads/files/vilujonitozavobojuz.pdfIn PDF document text
    • http://romanasulcikova.cz/userfiles/dedilumisevazoz.pdfIn PDF document text
    • http://cdn.eagle.mn/uploads/userfiles/files/58571096169.pdfIn PDF document text
    • https://xtrafitcoaching.com/www/images/files/77414892467.pdfIn PDF document text
    • https://makiriaszto.hu/ckfinder/userfiles/files/tomenufosujunebij.pdfIn PDF document text
    • http://teplo76.ru/uploads/file/porixopag.pdfIn PDF document text
    • http://guides2alpes.org/uploads/file/68250796626.pdfIn PDF document text
    • http://www.greenfield-sustainability.com/images/files/vezajorawutorixugerelex.pdfIn PDF document text
    • http://kuppersbusch.hu/userfiles/files/76902720809.pdfIn PDF document text
    • http://www.buildonhope.org/file/patotukolekedup.pdfIn PDF document text
    • http://familiegravesen.dk/ckfinder/userfiles/files/38558625271.pdfIn PDF document text
    • http://www.mediagrand.hu/data/editorfile/50337959155.pdfIn PDF document text
    • http://thepokewave.com/uploads/files/63752948269.pdfIn PDF document text
    • http://bagliodeimille.it/userfiles/files/92402991241.pdfIn PDF document text
    • http://celyroknaterase.sk/editor_uploads/system/files/zukagotetevomidigelalot.pdfIn PDF document text
    • http://mikol-styl.cz/userfiles/file/43213486509.pdfIn PDF document text
    • http://daegyung.kr/userfiles/file/20210904191052.pdfIn PDF document text
    • http://franzoesischebulldoggen.eu/userfiles/file/naneduneduvikegoguwupo.pdfIn PDF document text
    • https://www.naabelectric.com/userfiles/files/vatefudasa.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_off0000ec88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC88 11136 bytes
SHA-256: 63f005d2d6a134558edb5d0a3d7cc3d58312f436923370efed11ea4df3205291
font_01_sfnt_off0001062a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1062A 17968 bytes
SHA-256: 44461d4bf5c9b13b69fee833ca87efd4e513917d95a59e48e0cca0d517e937e5
font_02_sfnt_off000134d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134D4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1