Malicious PDF — malware analysis report

Static analysis result for SHA-256 273fef0e46175234…

MALICIOUS

PDF

81.9 KB Created: 2021-09-09 19:15:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f074f60e5042a681b47e0f7f4136f304 SHA-1: 424d5d440abba855a6ed69aac9102a5062e4f89b SHA-256: 273fef0e461752345587fb105c01ece64918493e4388fd21158c1e06e35cbb97
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is often used to redirect users to malicious websites or exploit vulnerabilities. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is designed as a link farm, likely to host phishing content or distribute malware. The ML classifier and ClamAV detection strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • 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.
  • 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 http://telektrans.hu/editor_up/26787413264.pdf In PDF document text
    • http://szkolka-wiercioch.pl/files/file/91945062900.pdfIn PDF document text
    • http://armiikrajowej36.pl/public/upload/ckfinder/userfiles/files/sepopepixubekobatavitawo.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/041738152894.pdfIn PDF document text
    • http://yuha.be/_files/file/15135001723.pdfIn PDF document text
    • http://17njl.com/userfiles/files/ximos.pdfIn PDF document text
    • http://pomodorolennep.de/gfx/userfiles/files/zojuj.pdfIn PDF document text
    • http://mindentudor.hu/userfiles/file/gabigoditifadukelolamifiv.pdfIn PDF document text
    • https://people11people.gr/uploads/File/sijorojopud.pdfIn PDF document text
    • http://investbuild.ru/var/upload/file/wumozixifopojolujowatowa.pdfIn PDF document text
    • http://duocmyphamcongty.com/app/webroot/uploads/files/depezorepuzamit.pdfIn PDF document text
    • http://piannocreativo.com/js/new/fckeditor/userfiles/file/65874044991.pdfIn PDF document text
    • http://safetyassessmentsolutions.co.uk/ckfinder/userfiles/files/31885068723.pdfIn PDF document text
    • https://www.afoa.org.ar/backend/ckfinder/userfiles/files/xarusekotabukumew.pdfIn PDF document text
    • http://toroisg.com/public/images/files/marala.pdfIn PDF document text
    • http://factorycontrolprojects.com/userfiles/file/34842299130.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1612f8d9ae4bbf---lutijonekin.pdfIn PDF document text
    • http://nirmalapublicschoolerumely.com/userfiles/file/97046719160.pdfIn PDF document text
    • http://kotrackusa.com/fckedit_file/file///20210907_3_52_14.pdfIn PDF document text
    • https://sudhirsachdevaclasses.com/ci/userfiles/files/padowazifubudonal.pdfIn PDF document text
    • https://ssmahavidyalaya.org/lion/uploadedfiles/fck/files/file/wobadokejob.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132e856bed63---95843705964.pdfIn PDF document text
    • https://olivermilk.vn/tctt/sites/aaa/file/46129076625.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=mario+sunshine+flashPDF 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_off0000deec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEEC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f6fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6FE 17028 bytes
SHA-256: 616681e23703a3d4ed8a287f657cd3ec674af352a79924d420b871a0479df58c
font_02_sfnt_off0001232c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1232C 10308 bytes
SHA-256: c38f7dddcc8488393c28f5c967073c2a8c0a33a9859b64c1de5b1a3b405f2737

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