Malicious PDF — malware analysis report

Static analysis result for SHA-256 da6a10e08f7d4dbc…

MALICIOUS

PDF

85.2 KB Created: 2021-01-29 11:31:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 4a0b048a4957773e31632ea6e586420f SHA-1: 94bd5b65b9741b1f4e3a01b092d5f1097da02054 SHA-256: da6a10e08f7d4dbca4c99070ab0a1730aaefc1ea532f35058271e811ecdb96c3
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9997

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://crophysi.ru/aws?utm_term=campbell+biology+chapter+13+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4367621/normal_600535a705c4f.pdfIn PDF document text
    • http://xojerodisus.22web.org/afro_blue_sheet_music.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421615/normal_5fcd66e9b9af0.pdfIn PDF document text
    • http://mamajan.space/rorinajobatudotupanazkijk.pdfIn PDF document text
    • http://1yamal.space/christmas_movie_trivia_questions_and_answers_printable9ouxe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485001/normal_6013141182f1d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478926/normal_5fdd72896b3ab.pdfIn PDF document text
    • http://damodudajipofem.22web.org/pifalanigisokupasapej.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bisiku/90285065443.pdfIn PDF document text
    • http://sinalowus.epizy.com/59568074337.pdfIn PDF document text
    • https://s3.amazonaws.com/gifojuxaxeva/free_simultaneous_equations_worksheet_with_answers.pdfIn PDF document text
    • http://dobejul.epizy.com/davis_cup_2019_tv_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/kevava/apgli_form_no._29.pdfIn PDF document text
    • http://vugapadilubokis.epizy.com/report_line_fault_talktalk.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://scripts.sil.org/OFLIn 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_off0000fad8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD8 5752 bytes
SHA-256: b45b8be259817e427725028a183704ac2dfd79f860547dad825e915f7859df3e
font_01_sfnt_off00010e4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E4B 10860 bytes
SHA-256: 65af312e58d0a9c15b2aefc98cc0ff8b865f9a7243a8c544bf3fa3de91c5740a
font_02_sfnt_off000132d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132D9 16076 bytes
SHA-256: 3098f8e70b5fa629bc49fbe595ab5dc47aeded038fd462cdaec0aa5662753641

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