Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1e0fa5df80356bc…

MALICIOUS

PDF

103.6 KB Created: 2021-09-08 13:07:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 63fee1d3d6d1f196a89f8287d7f33d62 SHA-1: 0c6629ae031f4d236841c2160a686a124d5cc3af SHA-256: e1e0fa5df80356bc0582c0ef6e6cbfae19dc75c86871cb00ac07cf3e62b907b2
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://synerhu.ru/uplcv?utm_term=python+extract+page+from+pdf PDF link annotation
    • https://jordanadams.com/ckfinder/userfiles/files/xevavudetujakunonet.pdfIn PDF document text
    • https://corpeverest.com/ckfinder/userfiles/files/roroxezebisaw.pdfIn PDF document text
    • http://tortsurprise.ru/upload/redactor/files/giwuragige.pdfIn PDF document text
    • http://cartopack.be/Images/file/ketufokinukemajevisemu.pdfIn PDF document text
    • http://neza.cz/UserFiles/File/soxenovejowalovijeviwer.pdfIn PDF document text
    • http://dylogistics.com/userData/board/file/44831968991.pdfIn PDF document text
    • http://sbkf.org/files/files/jozuvulonolekovixuzodo.pdfIn PDF document text
    • https://servingltda.com/userfiles/file/31094957299.pdfIn PDF document text
    • https://cafesca.org/ckfinder/userfiles/files/19631937967.pdfIn PDF document text
    • https://hw-power.com/uploads/ckfiles/files/613514d7a5e75.pdfIn PDF document text
    • https://revive.fashion/upload/files/78604930692.pdfIn PDF document text
    • https://melz-feu.ru/upload/43850339772.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612eb82512a90---tajesotolilozile.pdfIn PDF document text
    • http://ei-windykacja.pl/upload/file/78236695317.pdfIn PDF document text
    • http://tasarimak.com/ckfinder/userfiles/files/vudafapabudesume.pdfIn PDF document text
    • https://themalc.org/files/file/wijikonodetuj.pdfIn PDF document text
    • http://soc-in.com/data/media/files/83721603577.pdfIn PDF document text
    • http://globalsocialwlefaresummit.com/app/webroot/uploads/ckuploads/files/voxilan.pdfIn PDF document text
    • http://abbeloosschinkels.be/userfiles/file/tijubogepekofitojan.pdfIn PDF document text
    • http://medicalproduct.hu/images/files/jawija.pdfIn PDF document text
    • http://thailaundry.com/imgUpload/files/naduluduveseb.pdfIn PDF document text
    • http://bilmatbasim.com/userfiles/file/13870409011.pdfIn PDF document text
    • http://ipmarketing.net/FCKeditor/editor/filemanager/connectors/userfiles/file/gipabatovof.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_off0001303b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1303B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00014852.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14852 10980 bytes
SHA-256: 3363519c98df7feba1a19307d048997cf393d152e14812f36d819dcf368007cf
font_02_sfnt_off00016177.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16177 18052 bytes
SHA-256: cee4b1521957d258389dbdaf4b19909ed9c1bce47c7d5bb3509b4cccd7efc785

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