Malicious PDF — malware analysis report

Static analysis result for SHA-256 94e2da8a65716e5b…

MALICIOUS

PDF

87.5 KB Created: 2021-09-19 06:21:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: eab8a539f2e1b3048c01b13e15736e29 SHA-1: d9fe42b612da0d9ea9243f71463f8706b38ebcf5 SHA-256: 94e2da8a65716e5b8489619f066b574400db0fa147b7d25fd3f933f5a8c871bc
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains a large number of embedded URLs, many pointing to disposable hosting, suggesting a link farm or phishing lure. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest it's designed to redirect users to malicious websites, potentially for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://irlanc.ru/uplcv?utm_term=make+app+icon+invisible+android PDF link annotation
    • http://www.benyowsky.com/resources/files/bupazokijositov.pdfIn PDF document text
    • https://biogenetixpharma.com/ci/userfiles/files/82378853423.pdfIn PDF document text
    • http://www.tm-africa.com/beta/public/uploads/cms_filescms_files/85504696119.pdfIn PDF document text
    • https://dom4m.de/userfiles/files/99314783315.pdfIn PDF document text
    • http://jsdarvin.com/files/10064606171.pdfIn PDF document text
    • https://led7.ru/file/96056140540.pdfIn PDF document text
    • http://www.rify.us/cms-uploads/files/63664171944.pdfIn PDF document text
    • http://pnalog.ru/images/file/vabuvipuvositowepela.pdfIn PDF document text
    • http://memsports.com.br/admin/libs/ckeditor/ckfinder/files/mural.pdfIn PDF document text
    • https://kingwaterpure.com/ckfinder/userfiles/files/66416167897.pdfIn PDF document text
    • http://jinsonmetal.com/Upload/file/limugito.pdfIn PDF document text
    • http://varadimasszazs.hu/uploads/files/rumitufotojajo.pdfIn PDF document text
    • http://kokocurry.gm/userfiles/file/13381642779.pdfIn PDF document text
    • http://batistar.fr/userfiles/file/kuberufujixoge.pdfIn PDF document text
    • http://artvideo74.ru/upfiles/files/pakadilirebul.pdfIn PDF document text
    • http://resurrection-life.net/userfiles/files/finuw.pdfIn PDF document text
    • http://www.adarshvidhyasankul.org/userfilesfile/57022894943.pdfIn PDF document text
    • http://ambcavallon.eu/userfiles/files/99807423394.pdfIn PDF document text
    • http://cloudinfo01.smartevolve.com/images/ckeditor/files/fazaw.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1614253d4b83ce---kigimematep.pdfIn PDF document text
    • https://www.tcf.gov.tr/ckfinder/userfiles/files/loxizo.pdfIn PDF document text
    • http://lmleadmanagement.com/userfiles/files/waterimufakaf.pdfIn PDF document text
    • http://drivingtesttips.ie/fckeditor/userfiles/file/42631782371.pdfIn PDF document text
    • https://palet-school.com/files/files/zadof.pdfIn PDF document text
    • http://whuntex.info/userfiles/file/41910868305.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_off0000f050.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF050 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010862.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10862 18396 bytes
SHA-256: 87987b01da3b971bf6af63c8bf4cc692ddc6f6a5b34d0b49c27a491af27ef2bc
font_02_sfnt_off000137aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137AA 10700 bytes
SHA-256: 59919ab70009b9a6eceadd8ef5a302f6140048239728262fff12bc4c83956c5a