Malicious PDF — malware analysis report

Static analysis result for SHA-256 ceb27d29c8dbb869…

MALICIOUS

PDF

78.4 KB Created: 2021-09-09 01:47:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: eefd3d1822f24455f9960ce89d6d17ad SHA-1: 96885fbd97b9c48f54e983108cc4253e04bd7bf1 SHA-256: ceb27d29c8dbb869ec892dae3cebd174748d3e62d0807d197c1b9f1dc559ebf9
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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 http://volkshilfe-ktn.at/images/content/files/11146874553.pdf In PDF document text
    • http://tjjjsh.com/uploads/files/47391693203.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/d7fe06ec986ec7b180bb7e989b934c7e/58716030837.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613931e0e18d7---25808598763.pdfIn PDF document text
    • http://jd6618.com/jd6618/file/2021-9/file/LwpCms2021_09_03_13_26_50_7817.pdfIn PDF document text
    • https://indiantiffin4me.com/nbloom/fckuploads/file/jebovumowobelarek.pdfIn PDF document text
    • http://baruraprotidin.com/assets/ckfinder/core/connector/php/uploads/files/dubumibevoxubujer.pdfIn PDF document text
    • https://www.newhorizonscrisiscenter.org/ckfinder/userfiles/files/vusagimaveguxu.pdfIn PDF document text
    • https://kampusogrenciyurdu.com/file/robatugilijimifovif.pdfIn PDF document text
    • https://mekongtransport.com/upload/userfiles/files/jixuvapitijalozerud.pdfIn PDF document text
    • http://ugyvednok.hu/userfiles/file/62262750065.pdfIn PDF document text
    • http://kaies.cn/upfiles/210901100719643245mobhmy.pdfIn PDF document text
    • http://airconbank.com/upload/fckeditor/file/66664964878.pdfIn PDF document text
    • https://tivicom.vn/upload/files/mifudasik.pdfIn PDF document text
    • http://oikoscoccatoarchitettura.com/userfiles/files/80791361751.pdfIn PDF document text
    • http://groupementpecheduloir.com/ckfinder/userfiles/files/pifemibimexivexobekituzum.pdfIn PDF document text
    • http://finemetal-cn.com/upload/files/27632669470.pdfIn PDF document text
    • https://manuscripthandler.com/userfiles/file/79443758407.pdfIn PDF document text
    • http://retailcop.ca/files/33167112820.pdfIn PDF document text
    • https://mogilew.ru/userfiles/file/sarizujobasipusi.pdfIn PDF document text
    • http://jun-travel.com/userfiles/file/50064789749.pdfIn PDF document text
    • http://awarelaxcentrum.cz/user_files/file/jatefevomokijir.pdfIn PDF document text
    • http://qdsenfeng.com/data/files/42309341048.pdfIn PDF document text
    • http://abwingsjanaf.com/uploads/files/91426695705.pdfIn PDF document text
    • http://windowsplusllc.com/ckfinder/userfiles/files/23493310191.pdfIn PDF document text
    • http://pwmtqatar.net/userfiles/file/modabiramudemoguzawu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=the+mental+game+of+trading+jared+tendler+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_off0000cd2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD2F 17596 bytes
SHA-256: 93ff0d170fc02c7becab9f241c80eacf250bf89d53302a9a7e5150cbc61488c2
font_01_sfnt_off0000fab9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAB9 10872 bytes
SHA-256: 8a29dec5daf8b38c907c6fcedc45dc0eedd6123e99cfad9f1a16136ac57361f4
font_02_sfnt_off00011351.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11351 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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