Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6ed43f2473abd7b…

MALICIOUS

PDF

72.0 KB Created: 2021-09-27 18:18:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: e4d5714180953479fb50e607e0ec44e4 SHA-1: c090dcb18f70dc86af4f2d77b1010e71982870fd SHA-256: d6ed43f2473abd7bf703a59a9b81efff374c113faefa9ea57903fd0c52762b65
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple URIs, including one pointing to a raw IP address, indicating a malicious intent to redirect the user. The ML classifier and ClamAV detection strongly suggest this is a phishing or malware distribution attempt. The presence of JavaScript points to T1059.007, and the nature of the file suggests it was likely delivered as a spearphishing attachment (T1566.001).

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/8a0o2lc9l3h06ka5gpsmfab72p/woxid.pdf In PDF document text
    • https://krossi.ru/images/content/files/nagoxidipuvu.pdfIn PDF document text
    • http://domario.ru/userfiles/file/lutifiwowewumu.pdfIn PDF document text
    • https://lmetinternationalschool.in/ckeditor/ckfinder/userfiles/files/57028295468.pdfIn PDF document text
    • http://qianlong99.org/ckfinder/userfiles/files/gibaf.pdfIn PDF document text
    • https://uleiuri.ro/userfiles/file/xawezatetelotozud.pdfIn PDF document text
    • http://npi-management.com/ressource/site-image/files/fomike.pdfIn PDF document text
    • http://bscartridge.com/pic/mirubumer.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613812fe4258f---vadazapewunewizijitavaku.pdfPDF link annotation
    • https://xn--bankkrtya-41a.hu/js/ckfinder/userfiles/files/rafigegevow.pdfIn PDF document text
    • http://speaklifeiamgreatness.com/files/files/winusepe.pdfIn PDF document text
    • https://proxus.nl/file/14683986797.pdfIn PDF document text
    • http://vuason.vn/upload/files/dojex.pdfIn PDF document text
    • https://csmgh.net/pevron/www/img/file/puvozegafixerizunizo.pdfIn PDF document text
    • https://artgallery.devctn.com/ckfinder/userfiles/files/duvexapujudojo.pdfIn PDF document text
    • http://ssteelelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/pipege.pdfIn PDF document text
    • https://www.theoakshealthcare.com/my_content/js/ckfinder/userfiles/files/57929805385.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=bliss+os+live+cdPDF 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_off0000b323.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB323 10016 bytes
SHA-256: 2e34393b6ff911e5ccbc87b412d0ce4b6a5b895f33c5fd71bed4e921238ae845
font_01_sfnt_off0000c97a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC97A 18440 bytes
SHA-256: 720ab419eff77f4ad67e5d07943f259b1b60db6527356733bb8ede5cda3f299b
font_02_sfnt_off0000f9a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9A7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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