Malicious PDF — malware analysis report

Static analysis result for SHA-256 056b949ca5209cc1…

MALICIOUS

PDF

76.3 KB Created: 2021-03-06 18:48:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: d3745b38f69d168a7c2f0496b7ecd412 SHA-1: 80f852a73ea202666b225e2a17e18092da12a387 SHA-256: 056b949ca5209cc1e5d546aab505889e2439e5257c8fe644c4f496ad5ec767ff
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with a primary suspicious URL pointing to 'seumenha.ru'. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is designed to host multiple links on disposable hosting, further supporting a malicious intent to redirect users. No scripts were extracted, but the overall structure and URL analysis suggest a phishing or malware distribution attempt.

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://seumenha.ru/wix?keyword=puppet+show+scripts PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369908/normal_60280b0845c0c.pdfIn PDF document text
    • http://nezowigivomi.scienceontheweb.net/how_to_connect_plantronics_headphones_to_cisco_phone.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454162/normal_5fff98feb76fb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478687/normal_5fcbe1410f284.pdfIn PDF document text
    • http://aycotoro6.xyz/my_left_foot_book7dzf3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473384/normal_5fef5f028de82.pdfIn PDF document text
    • http://tazizinujumijoj.mywebcommunity.org/61712978975.pdfIn PDF document text
    • http://nebofonuve.mywebcommunity.org/70990651736.pdfIn PDF document text
    • http://rent-nout.site/marine_corps_water_survival_qualification8lmbg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412887/normal_6021bb660f22e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489042/normal_5ff1ad43ecd56.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383915/normal_5fde8794779e0.pdfIn PDF document text
    • http://povar2020.site/kukazokezevapesussdhak.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384325/normal_5fc59b889a357.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1e1cead-ca80-444a-8d5a-e8426e8c9203/ditiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67d63343-5853-49a5-ba51-eff8896838f1/how_to_become_nationally_certified_medical_assistant.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8935ae73-46f5-4400-b960-ace5a458765c/interior_designing_courses_in_canada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45c0a077-f52d-43a6-be22-04eb6fc48773/94376696300.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50ec6786-c993-4e38-9c25-bacf1ccbacec/zezujugaxodilobalowonike.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8baf680-e22b-4be3-a867-b2c105e0b906/nuxasu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f4d6a99-0cb0-42a5-a890-cc76c1fd4525/goxonevej.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_off0000f215.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF215 4872 bytes
SHA-256: ec1274ea7dbd301a38301ab508f0bfb3fe39a8683a60805cd9c6f1506d1c18b2
font_01_sfnt_off000102ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102BA 9912 bytes
SHA-256: 762df5d2d676d89370dcc34fee5b50fc24715a31920b46e282fcc782e0a6778d

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