Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1f2c1497abddd3c…

MALICIOUS

PDF

70.2 KB Created: 2021-09-14 09:37:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d802c1979904ee2a934be330030c27f9 SHA-1: 3350e0c4f4ce02fa260c78c0e20cff75158ea11d SHA-256: e1f2c1497abddd3c98cefcd0ac90e787a9259baf4180c6b749b24af9f5f27b68
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs, many of which are hosted on disposable domains, suggesting a link farm designed to redirect users. One specific URL, 'https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=igi+2+game+download+for+android', appears to be a lure for downloading a game, which is a common social engineering tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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 http://mynotary.ca/sites/all/sites/mynotary.ca/files/52076914109.pdf In PDF document text
    • http://namadagaskare.ru/ckfinder/userfiles/files/miwudedofapenag.pdfIn PDF document text
    • http://lamekatus.com/uploads/ckeditor/files/sakexevanadone.pdfIn PDF document text
    • http://eluvial.com/sites/all/sites/eluvial.com/files/93112273823.pdfIn PDF document text
    • http://yksskj.com/ckfinder/userfiles/files/42743498862.pdfIn PDF document text
    • http://laulumaja.fi/ckfinder/userfiles/files/mifizowolegazoworuka.pdfIn PDF document text
    • http://saaretravel.ee/images/file/supojud.pdfIn PDF document text
    • http://lpc2529.com/piceditor/file/doxilivuz.pdfIn PDF document text
    • https://daulte.com/ckfinder/userfiles/files/novuzovipulilivipedi.pdfIn PDF document text
    • http://855solution.com/htdocs/cljr/data/files/18775929534.pdfIn PDF document text
    • http://maginsaatmetal.com/resimlerfiles/ditavudegofos.pdfIn PDF document text
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138b3a87c188---zasifovake.pdfIn PDF document text
    • http://soosanfix.com/upload/fckeditor/file/23061333130.pdfIn PDF document text
    • https://hunde-katzen.at/soubory/70910739158.pdfIn PDF document text
    • http://lawyergz.net/uploadfile/files/98533800547.pdfIn PDF document text
    • https://webmedcentralplus.com/userfiles/file/77240849094.pdfIn PDF document text
    • https://quanticabtl.com/cms_2018_quantica/sgi_userfiles/userfiles/files/wovigifiralulowobi.pdfIn PDF document text
    • http://demirlermetal.com/resimler/files/tixomefijeduma.pdfIn PDF document text
    • https://printsolutions.printsolutions.bg/uploads/wysiwyg/files/50055317047.pdfIn PDF document text
    • https://www.agcontraincendios.es/ckfinder/userfiles/files/fowawufogapuzuvoz.pdfIn PDF document text
    • http://htwy.com/upload/file/95232980293.pdfIn PDF document text
    • https://foodvellythailand.com/upload/files/rupatikamunojiwidukirez.pdfIn PDF document text
    • https://bomberosdenavarra.com/userfiles_nexo/files/43985055900.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=igi+2+game+download+for+androidPDF 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_off0000b4f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4F3 14976 bytes
SHA-256: 448290872fcc11aec379f320c7180d81c8d9d3c2a49aa40e18114740f6b5758d
font_01_sfnt_off0000dabc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDABC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f2d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D3 10588 bytes
SHA-256: 22783dc6b4dd6aa03bfd52e916ae57215182779846fa04981075086cb840ec5e