Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e432fd877bb132a…

MALICIOUS

PDF

87.3 KB Created: 2021-09-08 12:52:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 500dc537cdbccdd618dadf041dcbc808 SHA-1: f03d0a94b3cadc8e4d89cd01803367a8d1864fac SHA-256: 2e432fd877bb132a479903829bb40884a3c6de079eabdb6803bf3d54d3fb9f54
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 0.9947

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://sinoorchids.com/image/file/16191785414.pdf In PDF document text
    • http://yevres.fr/ckfinder/userfiles/files/12940308385.pdfIn PDF document text
    • https://cmottaviproductive.it/uploads/file/beseronafixiwop.pdfIn PDF document text
    • http://hoaiduc.edu.vn/ckfinder/userfiles/files/27876940812.pdfIn PDF document text
    • https://alnahamgroup.com/userfiles/file/54518100705.pdfIn PDF document text
    • http://finara-v.com/file_media/file_image/file/17189124713.pdfIn PDF document text
    • https://phr4u.com/files/piduni.pdfIn PDF document text
    • https://natyabio.com/uploadfiles/jalabujezatamopot.pdfIn PDF document text
    • http://bestapp4u.com/admin/uploadedfiles/file/31401667411.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16135067f5fffb---39284472080.pdfIn PDF document text
    • http://optimaglobal.net/ckupload/files/74803768475.pdfIn PDF document text
    • http://rwdwebwebdesign.com/img-aim/files/saxuposonibubosemadik.pdfIn PDF document text
    • http://vagtteam.com/userfiles/Files/60835690004.pdfIn PDF document text
    • http://johnmarzillier.com/ckfinder/userfiles/files/54022226018.pdfIn PDF document text
    • http://biplano.eu/userfiles/files/77440496323.pdfIn PDF document text
    • http://denki-shonan.com/uploadsfile/jewogadededetowabezibujoj.pdfIn PDF document text
    • https://tractorpulling-emmeloord.nl/upload/file/68284581111.pdfIn PDF document text
    • http://theartofdesign.nl/ckfinder/userfiles/files/77353194000.pdfIn PDF document text
    • http://yh-nutri.com/filespath/files/20210905111503.pdfIn PDF document text
    • http://www.laterveer-biesenbeek.nl/ckfinder/userfiles/files/tazixawatilodubasurazavuv.pdfIn PDF document text
    • http://www.huntsvillepr.com/files/files/paguwuzalobew.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/9i4cv743ifdcmc8h5aj23tpjc1/mupanovonodejaga.pdfIn PDF document text
    • https://instalacje-elektryczne.net/ckfinder/userfiles/files/18123753804.pdfIn PDF document text
    • http://brmhn.com/userfiles/file/20210905182715_hz8z1j.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=interpretation+of+raman+spectra+of+disordered+and+amorphous+carbon+pdfPDF 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_off0000edbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDBF 11028 bytes
SHA-256: 445552e5b2ce60816d2df44f6ac71578fbd2b4b3e7d1899b824182ad3702c1ae
font_01_sfnt_off00010705.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10705 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011f17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F17 18384 bytes
SHA-256: 6c0a6e02b65af8b697c290dcb3d82447cfa2645d43208565ac8cb7dc5518959a

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