Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e4e9340bd6ad02c…

MALICIOUS

PDF

63.6 KB Created: 2020-12-22 15:53:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 708308c1a7558a31101c7c205fa1e3b1 SHA-1: 9d94b1773325db93b401745e66477da15d687a59 SHA-256: 9e4e9340bd6ad02cd29a87ba549f51d77a5b7e2786e6ee1065d532671899d8d8
184 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also strongly flagged this PDF as malicious. The presence of multiple links on disposable hosting suggests a link farm designed to distribute malware or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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.
  • 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://cctraff.ru/strik?utm_term=sceptre+tv+remote+code+optimum In PDF document text
    • https://giboritozi.weebly.com/uploads/1/3/1/3/131379296/wafevogule_fukemawiduliset_velezaderoxiluk_tivawitorirob.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484154/normal_5fabf2447e6af.pdfIn PDF document text
    • https://zapaviboxoxag.weebly.com/uploads/1/3/3/9/133997465/3980491.pdfIn PDF document text
    • https://pulipelese.weebly.com/uploads/1/3/4/6/134686308/zafupovenim.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483836/normal_5fc22db39307c.pdfIn PDF document text
    • https://bizalaso.weebly.com/uploads/1/3/4/4/134443832/wibimewisug_rakejekuta_wijugegon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450440/normal_5f9f055e8ae68.pdfIn PDF document text
    • https://jarajegixam.weebly.com/uploads/1/3/1/4/131437089/2089736.pdfIn PDF document text
    • https://tijaworiluwulu.weebly.com/uploads/1/3/4/3/134363233/1368355.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489839/normal_5fd666268ac97.pdfIn PDF document text
    • https://gigunomivu.weebly.com/uploads/1/3/0/9/130970016/segarisefizozox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371266/normal_5fc257b47a2a0.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/rufonali/38796497077.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/802658f1-6df3-44e7-8880-4dea05928279/pathophysiology_ebook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9dc4c96-24a1-41e5-a66c-e12ad1e3ddaa/peacekeeping_mission_tarkov.pdfIn PDF document text
    • https://s3.amazonaws.com/tamobalasu/balanced_scorecard_example_manufacturing_company.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bf60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF60 4964 bytes
SHA-256: 5f2d12cbbf7d4d6588ab05cd7153a97fc0f3fa5e0839ed601581492271063a72
font_01_sfnt_off0000d038.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD038 9728 bytes
SHA-256: ec7c2f18bb2cf7d3dbde0d584a3f4627dea79ff3d1d1d8abb442afecf9eca56d

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