Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e0c6a35fb7523e1…

MALICIOUS

PDF

110.4 KB Created: 2021-04-07 00:22:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 5fe6b7231ea1fef1f9f5a0cd9bc6d188 SHA-1: 542a042caf9c00ffb5fd8b7e1033060e589760ac SHA-256: 0e0c6a35fb7523e19e51fa693cd4fcf2dd07ea11801c380f2df5d8d36a151f26
186 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 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 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://seumenha.ru/wix?keyword=monty+python+god+be+praised+gif PDF link annotation
    • https://mututekabifu.weebly.com/uploads/1/3/4/4/134466573/2865665.pdfIn PDF document text
    • http://zibukebolavor.22web.org/kumon_reading_workbooks_grade_1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499995/normal_605f5bffa9249.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465392/normal_5fd65b52ccae7.pdfIn PDF document text
    • https://cdn.sqhk.co/lakekomum/jhdIje2/real_dragon_simulator_3d_mod.pdfIn PDF document text
    • http://kafixerutatad.iblogger.org/weekly_menu_planner_excel_template.pdfIn PDF document text
    • https://resusogid.weebly.com/uploads/1/3/5/3/135346187/rabovataw.pdfIn PDF document text
    • https://cdn.sqhk.co/jigijobofofa/jgihijh/50340552688.pdfIn PDF document text
    • https://cdn.sqhk.co/pafevola/htigEjd/52919204708.pdfIn PDF document text
    • https://febelozo.weebly.com/uploads/1/3/4/5/134599394/nevidekoxam.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sulalanetoki.epizy.com/photoshop_3d_letters.pdfIn PDF document text
    • https://3d7304b5-8527-495f-b913-615d6f357a43.filesusr.com/ugd/ef7486_6e972045ff64468f9d0a57c3c74b6107.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/21a174e1-49a7-4ff2-9c90-2dc3f3b16cbf/beats_by_dre_powerbeats_3_charging.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b009d4b-1431-40dd-abba-917b546a3406/62343263295.pdfIn PDF document text
    • https://2cc12256-1025-444a-bacb-901a9f007bda.filesusr.com/ugd/d1fcfc_40f1e3f213f7496f8c8b82fa2ed8b91c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/679e14ec-7e38-44b6-971e-d94d79fa53f9/how_many_senators_are_needed_for_a_quorum.pdfIn PDF document text
    • https://d102a0f2-001f-4998-bb0a-88ac30ac05b5.filesusr.com/ugd/771ea4_3605b53348cd4ce3ba05b33295ed7436.pdf?index=trueIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017182.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17182 5520 bytes
SHA-256: 57b45757984f21c79517c1c3eaf72473cf1c7d3dd4f17a73784de9fedc2b8019
font_01_sfnt_off0001844d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1844D 11592 bytes
SHA-256: 0faabcf79971eb72940113aba4d9cff9b4ec9fb2c55d184c6233082fe31eea31

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