Malicious PDF — malware analysis report

Static analysis result for SHA-256 06272fd0db369988…

MALICIOUS

PDF

71.6 KB Created: 2021-10-10 21:27:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 820ec6ed99d9d0886c325373105b71c1 SHA-1: 710d9cc8537c229fd774d25a0a94f11a8e67d1b5 SHA-256: 06272fd0db369988c1edf26761790191a395e47e748052bc8aad17bc757a5f15
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as malicious by ML classifiers and ClamAV, with high-confidence heuristics indicating it contains embedded JavaScript and external URIs. The PDF structure suggests it's a link farm designed to redirect users to potentially malicious sites, as indicated by the PDF_SEO_DISPOSABLE_LINK_FARM heuristic. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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 http://premiercontainerlines.com/media/ftp/file/23616032796.pdf In PDF document text
    • https://atx-stroy.ru/wp-content/plugins/super-forms/uploads/php/files/a0cc9bd918bb31e4aa67538bb8c41d1e/ritexagerufagedanunus.pdfIn PDF document text
    • http://hasicimosnov.cz/foto/Image/file/49094693607.pdfIn PDF document text
    • https://korvioinfotech.com/ckfinder/userfiles/files/sekunes.pdfIn PDF document text
    • https://resicolor.com/upload/files/34913575145.pdfIn PDF document text
    • https://skywaynepal.com/userfiles/file/dimesuzori.pdfIn PDF document text
    • http://originalbau.hu/imagesfiles/niwabes.pdfIn PDF document text
    • http://arniuniversity.in/ci/userfiles/files/weregasudokoj.pdfIn PDF document text
    • http://xahscw.com/userfiles/file/fuwemilogimuxojemolus.pdfIn PDF document text
    • http://mateuszkucharski.pl/admin/file/wixibuvizopepitodobogu.pdfIn PDF document text
    • http://sieuthibongda.net/ckfinder/userfiles/files/64871046554.pdfIn PDF document text
    • http://gesgo.de/userfiles/file/35157498516.pdfIn PDF document text
    • https://cissud.com/uploads/ck_editor/files/rizogakunexukonosevebus.pdfIn PDF document text
    • https://ambalatender.com/upload/files/46829364223.pdfIn PDF document text
    • http://www.tecnologycenter.com/admin/uploaded/fck/file/59982123270.pdfIn PDF document text
    • http://simoncaulkin.com/images/41218355411.pdfIn PDF document text
    • https://patriciobanados.cl/upload/file/In PDF document text
    • http://ahnil.com/userData/board/file/zosomomunozowuv.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140e6122cfd5---96924024810.pdfIn PDF document text
    • https://noble-program.site/js/ckfinder/userfiles/files/wemumumo.pdfIn PDF document text
    • https://www.hkha.com.hk/ckfinder/userfiles/files/62143234513.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=insurance+industry+overview+pdfPDF 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_off0000b696.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB696 16176 bytes
SHA-256: 6faab1a68fb57ef3b698b4a867ee15f7059a9e6c55e2b7115b2a9686b296b87f
font_01_sfnt_off0000df73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF73 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f78a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF78A 10884 bytes
SHA-256: daaa92d06808dc61414f26d2e9d084fb41d065be0281b593a95dd0abd48e67ef

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