Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbb21a5f4296ca43…

MALICIOUS

PDF

68.8 KB Created: 2021-09-09 01:30:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-23
MD5: ea62c0a11992e31570b17bf3a7450301 SHA-1: 189cd4c6b385d1286c72d53cb1a25ad0199e1989 SHA-256: dbb21a5f4296ca43ffc04fa4193d8c26c1694373a4a309ae00ec7bc3d2f98b16
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 0.9965

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://tasteadmin.com/ckfinder/core/connector/php/custom/wysi_uploads/files/76702802043.pdf In PDF document text
    • http://cungcapthitdetuoi.com/app/webroot/files/images/pages/files/34295180202.pdfIn PDF document text
    • http://klawiatury-foliowe.pl/_data/file/35755815248.pdfIn PDF document text
    • https://goooinggroup.com/userfiles/files/20210906_110528.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/643bbbb3b64835de01957183cb0528ae/kekuwaluk.pdfIn PDF document text
    • http://milwaukee.center/userfiles/file/lepabuvufewi.pdfIn PDF document text
    • http://redondoclassicburger.com/uploads/files/99024856293.pdfIn PDF document text
    • https://strategieb2b.com/userfiles/file/zetojefibiwegeripopexawul.pdfIn PDF document text
    • http://nenkin-t.com/upload_img/ck/files/gewetuzatoworekifopemez.pdfIn PDF document text
    • https://doanhnghiepvietnam.niengiamdoanhnghiep.vn/img_duhoc/files/32926132992.pdfIn PDF document text
    • http://www.cddfct.com/up_files/file/fatujewodexagexejewimemi.pdfIn PDF document text
    • http://lifeline-sports.com/files/file/fijofon.pdfIn PDF document text
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16135e3608ab1d---nagabuni.pdfIn PDF document text
    • http://www.toptehnik.si/images/91300698334.pdfIn PDF document text
    • http://2safe4u.cz/UserFiles/File/82281866372.pdfIn PDF document text
    • http://mjengo.org/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/76122399703.pdfIn PDF document text
    • http://www.sun-green.eu/ckfinder/userfiles/files/81924647684.pdfIn PDF document text
    • http://encino.ilovepokebar.com/uploads/files/49681363101.pdfIn PDF document text
    • http://www.derbysignandgraphics.com/uploads/file/xupiramebej.pdfIn PDF document text
    • http://eachfun.com/ckfinder/userfiles/site_eachfun_com/files/nitiwotula.pdfIn PDF document text
    • http://praconsulgroup.ru/pict/file/95481920240.pdfIn PDF document text
    • https://kop-trans.pl/uploads/userfiles/files/kibuvixoda.pdfIn PDF document text
    • http://automotiveenergy.cz/userfiles/file/zodirasodotu.pdfIn PDF document text
    • http://amghanoi.com/images/ckeditor/files/98689612124.pdfIn PDF document text
    • https://manualismedicina.hu/fileok/file/75258500226.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=download+gta+san+andreas+android+originalPDF 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_off0000b132.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB132 10508 bytes
SHA-256: 1c488bd3513d723e5962937d891a85f087a38857ed2566027ee2fc46a98ec7a7
font_01_sfnt_off0000c911.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC911 14652 bytes
SHA-256: 973271fd2eb042839fb14d20968cea74530a11d1f30c9a40cfd035eb13223b19
font_02_sfnt_off0000ed7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED7B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.