Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ab60dd9169f2755…

MALICIOUS

PDF

102.6 KB Created: 2021-08-02 23:24:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 7c8636b4d19ed8ca10683f6336cabe94 SHA-1: 4d44e8cddb2b5393512c0f04ff20ba0444cf1768 SHA-256: 2ab60dd9169f2755b051e5a003bf5d41c12cb13db5fe741b361d4c8c4cd275fe
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to compromised websites or domains commonly used for hosting malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery through these links. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports the idea that this document is designed to funnel users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9856

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://go2germany.ru/files/file/78669151098.pdf In PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/4b0734df8c76db526fc5969239753c41/67907846956.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/9516241f99a518c1d3b9a5a4574c64e2/buwero.pdfIn PDF document text
    • https://www.justgym.co.za/wp-content/plugins/super-forms/uploads/php/files/ki83st705fboq3avse4e9lkd6t/fuzokit.pdfIn PDF document text
    • http://alumcity.ru/userfiles/file/vugimupekurazedudumekatev.pdfIn PDF document text
    • https://mariellatriolo.it/public/file/xenoxibojalozeze.pdfIn PDF document text
    • http://xn----8sbnbd9chja.xn--p1ai/userfiles/file/lemadija.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160afd33703fb8---xapemibejagekewonok.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/d50e47dc530c8d3200cde5f6411ccd6a/gabonejorukejiwevurod.pdfIn PDF document text
    • http://perfekttorun.pl/pliki/62302184063.pdfIn PDF document text
    • https://85097781.com/upload/files/64906521251.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fe87b7a7ea8---16755486465.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa50649412c---tekegavaxadovixovim.pdfIn PDF document text
    • https://elesud.it/img_pagine/file/ramavazesojowokuwiz.pdfIn PDF document text
    • http://kezmosas.hu/files/file/48380731526.pdfIn PDF document text
    • http://c2r-auto.com/uploadfiles/file/2021052400140773499.pdfIn PDF document text
    • https://spa-salon.ru/ckfinder/userfiles/files/51020454621.pdfIn PDF document text
    • http://www.pethouse.es/ckfinder/userfiles/files/nagod.pdfIn PDF document text
    • http://meble-tk.pl/userfiles/file/20001246703.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/qj1mrsf92i3u126akkbf0u5oa1/22289424883.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/16071bf9276dc3---nuwiziwikiwig.pdfIn PDF document text
    • http://pajurioverslas.lt/ckfinder/userfiles/files/41882475920.pdfIn PDF document text
    • https://alihuata.com/userfiles/file/80060980475.pdfIn PDF document text
    • http://xn----itbbfrdrdbd4bgy6gi.xn--p1ai/webroot/files/files/94973250541.pdfIn PDF document text
    • http://ddservice-bmw.pl/userfiles/file/56713814150.pdfIn PDF document text
    • https://alihuata.com/userfiles/file/27481545659.pdfIn PDF document text
    • https://combrooncom.com/contents//files/virimib.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=what+is+react+vs+angularPDF 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_off00012ac9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AC9 10548 bytes
SHA-256: 4133ea5ca275bd5dda550368854b925f545ecc9bcdf998c5aedd70d5afff81c5
font_01_sfnt_off000142d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142D4 18296 bytes
SHA-256: 0ea5236ac04093ad3a9837c1fcbc154a9c8bd37428980eeaca92186b52419692
font_02_sfnt_off0001735e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1735E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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