Malicious PDF — malware analysis report

Static analysis result for SHA-256 068f264239f4eef7…

MALICIOUS

PDF

97.5 KB Created: 2021-09-15 19:05:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: f427b5276af188ca90b5c375c9a56b72 SHA-1: 959f41df75e621339e966771f7f4fce42ee389d1 SHA-256: 068f264239f4eef77b1f9cb15d65815e33705750902b10eb4da1c85ed332a337
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains numerous embedded URLs pointing to various domains, suggesting a link farm designed to redirect users to potentially harmful content. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM further supports this, indicating a strategy of using disposable hosting for numerous links. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 5

  • 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.
  • 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://infrive.ru/uplcv?utm_term=chal+mera+putt+full+movie+online PDF link annotation
    • https://culturasiapamplona.com/guiarte_userfiles/files/5247054108.pdfIn PDF document text
    • http://personnelstrategies.net/userfiles/file/69505274863.pdfIn PDF document text
    • http://xn--2-140-swe8h.xn--p1ai/files/56107308961.pdfIn PDF document text
    • http://jlm-kg.com/uploads/file/widupomulipepojite.pdfIn PDF document text
    • https://ms01bet.com/contents/files/munujunozawijalipamajunu.pdfIn PDF document text
    • http://gshosnab.ru/userfiles/file/zixidumupaleloj.pdfIn PDF document text
    • http://pk.mo/userfiles/file/73899729581.pdfIn PDF document text
    • http://besteva.com/upload/files/sazanotenuk.pdfIn PDF document text
    • http://vimbark.sk/editor_uploads/files/jilamepulukev.pdfIn PDF document text
    • http://fgsconsulta.com.br/ckfinder/uploads/userfiles/files/67330331511.pdfIn PDF document text
    • https://njshore.drinkpoint.com/uploads/files/65001201914.pdfIn PDF document text
    • http://xn--aknmedical-yub.com/uploads/file/ladakiv.pdfIn PDF document text
    • https://exam11.menapoint.com/app/webroot/upload/files/folijesugowopa.pdfIn PDF document text
    • https://jewfri.kr/files/image/files/72053280433.pdfIn PDF document text
    • http://ecosdaliberdade.com/ckfinder/userfiles/files/xiwudijetemeku.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/8niiu5lfq4vstpoqin5o3o2kgr/93265215114.pdfIn PDF document text
    • https://verandapattaya.com/userfiles/files/74949710932.pdfIn PDF document text
    • https://m-astar.com/UserFiles/files/kewemebaz.pdfIn PDF document text
    • https://icicle-mountaineering.ltd.uk/ckfinder/userfiles/files/75902566335.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/o8h0ndevv5b7h4g28brn7upkku/bojil.pdfIn PDF document text
    • http://rlponder.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/dowilawividuboxi.pdfIn PDF document text
    • https://ms2oke.com/contents/files/zorikutavewatewurad.pdfIn PDF document text
    • https://angkalaris.com/contents/files/6234909356.pdfIn PDF document text
    • https://fresh-cherries.com/ckfinder/userfiles/files/sadez.pdfIn PDF document text
    • http://serramentisiciliano.it/userfiles/files/10589082588.pdfIn PDF document text
    • 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_off000115a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115A9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012dc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DC0 10652 bytes
SHA-256: 4e17e880a7091e5f86a0eaef0886b69db882985bf79f0215ad91070c7f976294
font_02_sfnt_off000145eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145EB 19192 bytes
SHA-256: e0bfe323b2acf91f6c3dd569ba8ed640907474525f5bcb44a7bfa6ee929bc0f8