Malicious PDF — malware analysis report

Static analysis result for SHA-256 08eca32dcb2bf824…

MALICIOUS

PDF

94.6 KB Created: 2021-09-13 23:06:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 53b37bfd02d6bb7785bad258e3e87e29 SHA-1: 8abbd370c6b7d163e17633ea40686105fa90a903 SHA-256: 08eca32dcb2bf824109d4d69c9b1d38db211e37ad726f0d7104d4e6bcaca92b9
134 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, many of which are part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The embedded JavaScript is a common technique for exploiting PDF vulnerabilities or redirecting users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9879

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://capecoralliving.com/media/file/dakuxefarakuveg.pdf In PDF document text
    • http://thebankcardservice.com/uploads/files/xavowegumomuvovofukupetef.pdfIn PDF document text
    • http://khocabien.com/uploads/files/49312779785.pdfIn PDF document text
    • https://dondepodemosir.com/userfiles/file/sawigojinisarowajepen.pdfIn PDF document text
    • http://mtkshop.com/images/uploads/file/51873723976.pdfIn PDF document text
    • https://telechips.com/ckfinder/userfiles/files/51870229866.pdfIn PDF document text
    • https://crownprolaw.com/userfiles/Proj_Name/files/16171991238.pdfIn PDF document text
    • https://jgranit.pl/userfiles/file/xalisuwi.pdfIn PDF document text
    • https://doluhosting.com/calisma2/files/uploads/bekewulifegor.pdfIn PDF document text
    • http://sapientgenerator.ru/files/userfiles/files/boxawamonuno.pdfIn PDF document text
    • http://arserwood.com/js/fckeditor/editor/filemanager/connectors/php/connector.php/upfiles/file/210905155051157705utev76.pdfIn PDF document text
    • https://2-view.org/home/view/public_html/ckfinder/userfiles/files/feruvizabo.pdfIn PDF document text
    • http://stensoproject.com/userfiles/files/sisoledavumozad.pdfIn PDF document text
    • http://gabinetpro.gabinetpro.pl/kosmetyczka/krakow/files/weratapuvapipeb.pdfIn PDF document text
    • http://thcsnguyenvanhuyen.hoaiduc.edu.vn/ckfinder/userfiles/files/posofunavegevava.pdfIn PDF document text
    • http://buydecor.ru/uploads/files/51970738308.pdfIn PDF document text
    • http://krr-nfe.com/suratnfe/UserFiles/File/fibozerotevikapesixejox.pdfIn PDF document text
    • http://crimesla.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jujijaporomofixomuj.pdfIn PDF document text
    • http://christmaslandint.com/userfiles/kapadunorixatofumi.pdfIn PDF document text
    • https://sealskinz.ru/files/file/14067057123.pdfIn PDF document text
    • http://arndt-fahrschule.de/userfiles/file/wetufimobonulesaxaf.pdfIn PDF document text
    • http://www.mmd.ntou.edu.tw/ckfinder/userfiles/files/vefevoz.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1613bdb29794ce---zexalagesova.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/a4a5vgqveind7d7u4qah6vev06/13849884095.pdfIn PDF document text
    • http://stapper.de/sites/default/files/userfilesfile/vobuserabezejijasifuwubo.pdfIn PDF document text
    • http://epicridesnepal.com/files/79051182487.pdfIn PDF document text
    • http://bamboomfi.com/htdocs/cljr/data/files/mavikamurumopemodi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=nokia+x1+price+in+pakistan+olxPDF 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_off00010c48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C48 10588 bytes
SHA-256: 2f9c5bdc429a0eacf827e0d486a5b8e66eea2aefb9116da2d8eed850f2acd64b
font_01_sfnt_off000124ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124AC 18764 bytes
SHA-256: d37bfac2d4f12c784a087b90500a4709de4dfeb6d59bc5f9a9f5e7699f818ec5
font_02_sfnt_off000154e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x154E3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1