Malicious PDF — malware analysis report

Static analysis result for SHA-256 67009265d6d09aed…

MALICIOUS

PDF

78.9 KB Created: 2021-09-20 00:05:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: f8c2085e5024515ba4e17e4740a5ec1f SHA-1: 2d261a03f191de3c592a056de87108bb3030bd58 SHA-256: 67009265d6d09aed1af84b02045a07ba7e86b90f44ebd6ef6acf4f3cd1176560
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for malicious PDFs to execute code. This script likely redirects the user to external URLs, as indicated by the numerous PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics. The sample was flagged by ML and ClamAV as malicious, supporting the conclusion that it is designed to lure users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://varvshistoriska.com/file/wokukoxatugoruz.pdf In PDF document text
    • https://ubranni.com/uploader/files/ziruzajotararu.pdfIn PDF document text
    • http://mayingiabao.com/upload/files/wiwepasavitif.pdfIn PDF document text
    • https://elesud.it/img_pagine/file/74047458239.pdfIn PDF document text
    • http://buffagiuseppeinfissi.com/userfiles/files/wenabefesumovuwutafawelo.pdfIn PDF document text
    • http://machinegroup.ru/img/outer/files/94706374876.pdfIn PDF document text
    • http://www.maderas-navarro.com/ckfinder/userfiles/files/97151192956.pdfIn PDF document text
    • http://capesociety.ca/uploads/files/95539743288.pdfIn PDF document text
    • https://gullyracing.it/admin/ckfinder/userfiles/files/juxagijurowirakano.pdfIn PDF document text
    • http://www.rify.us/cms-uploads/files/walewutaz.pdfIn PDF document text
    • https://tradingcall.in/ckfinder/userfiles/files/kubiridunuvedixidililapaz.pdfIn PDF document text
    • http://mundialimportweb.com/userfiles/file/85736891255.pdfIn PDF document text
    • https://soyana.de/js/ckfinder/userfiles/files/dowowivitilonek.pdfIn PDF document text
    • http://aquarium-kochi.com/app/webroot/ckfinder/userfiles/files/fipezefuwalibafofifed.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16144bab145f86---1637656745.pdfIn PDF document text
    • https://bankubezpieczen.pl/userfiles/file/bopiluto.pdfIn PDF document text
    • http://tyextractor.com/d/files/midopasawofupafejororujo.pdfIn PDF document text
    • http://baraanduliaptti.org/userfiles/file/wipaxuruja.pdfIn PDF document text
    • http://ginzaramen.us/uploads/files/36795170623.pdfIn PDF document text
    • http://secondhandgraphics.com/usrfiles/file/sititexejezorikurepipomas.pdfIn PDF document text
    • https://pypconsultores.mx/userfiles/file/5426816538.pdfIn PDF document text
    • http://ltpbetel.ro/userfiles/file/61454427734.pdfIn PDF document text
    • http://st-ark.it/userfiles/files/tisezorekorejawozupeper.pdfIn PDF document text
    • https://pelletier-tp.fr/ckfinder/userfiles/files/walumepinirepoligono.pdfIn PDF document text
    • https://cobrawire.com/userfiles/files/95733197615.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=faded+sheet+music+pianoPDF 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_off0000d184.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD184 17092 bytes
SHA-256: b64612b565c329dfed8ced8eb72b92ec57351c020fe6b916e5e08534a2b8b3c3
font_01_sfnt_off0000fde7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDE7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000115fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115FE 10712 bytes
SHA-256: 965a01c25f3d84b889196b45bef4c42f3d82bfd365724b418dde67d875064241