Malicious PDF — malware analysis report

Static analysis result for SHA-256 337c3771a1da2863…

MALICIOUS

PDF

78.0 KB Created: 2020-11-24 18:54:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: d63269e2986fa444aee02cadcbd78fea SHA-1: 15fe4af52a1215422660ce490ed46f6cac5f8d0d SHA-256: 337c3771a1da286315869463994b88fa62eedb14e2b588068179d4373c406b02
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://ggtraff.ru/123?utm_term=a+wild+sheep+chase+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4469359/normal_5fb625586f127.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460688/normal_5fbbd1ef3a720.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/henghuili-files2/bulimia_nervosa_case_study.pdfIn PDF document text
    • https://s3.amazonaws.com/kovilowab/34614949545.pdfIn PDF document text
    • https://s3.amazonaws.com/figidireki/vukanefepatajisitapumaga.pdfIn PDF document text
    • https://s3.amazonaws.com/fogibi/examples_of_students_passion_projects.pdfIn PDF document text
    • https://s3.amazonaws.com/tokit/cookie_crumbs_hosta.pdfIn PDF document text
    • https://s3.amazonaws.com/jimugivos/koremipixaziputajisito.pdfIn PDF document text
    • https://s3.amazonaws.com/xovekolamoxe/29895735011.pdfIn PDF document text
    • https://s3.amazonaws.com/pusixa/30694663754.pdfIn PDF document text
    • https://s3.amazonaws.com/fedojigudaj/star_citizen_discord_overlay.pdfIn PDF document text
    • https://s3.amazonaws.com/wamatasamegu/petrovietnam_transportation_corporation_annual_report.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cae6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAE6 11800 bytes
SHA-256: a682ac26dd58657d102b774778bf4f85b83a866722dfdca3f2b67ae7e5482971
font_01_sfnt_off0000f1ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1EF 5228 bytes
SHA-256: 311e72ee06ad12b620b7d621860259689397dc085ada61fed0a6b52d721805e3
font_02_sfnt_off000103cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103CF 11508 bytes
SHA-256: a2a59a76442024dbef8e121d2ae0ade138c95eaa4fd98a927aa034ee769746a9

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