Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e7adbc11ea6add1…

MALICIOUS

PDF

79.0 KB Created: 2021-02-28 03:48:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: fc158f3cf2ca9d5284d0a16830333669 SHA-1: 90a13f5e2db799c33f4a40c9c1d58a4857264cbf SHA-256: 4e7adbc11ea6add16eb4c47af9c40ec3dc07cf5997db877d25f675d19a0260e6
126 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as 'Pdf.Phishing.Trojan' and ML classifiers indicated a high probability of maliciousness. It contains numerous embedded URLs, with a primary external URI pointing to 'https://mezovuduw.ru/aws?utm_term=fifty+shades+freed+book+preview', suggesting a phishing or content-luring attempt. The PDF also functions as a link farm, hosting a high number of distinct URLs on disposable domains, further supporting its role in a malicious campaign.

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
  • 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://mezovuduw.ru/aws?utm_term=fifty+shades+freed+book+preview PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4390381/normal_5fed7d297e07e.pdfIn PDF document text
    • http://kufafukedexepix.mygamesonline.org/how_to_count_to_1000_in_spanish.pdfIn PDF document text
    • http://gifozizonumili.iblogger.org/23575071915.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427783/normal_5feca0bddc6ca.pdfIn PDF document text
    • http://zuzitijimopa.22web.org/autocad_manual_book.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373753/normal_6025458481c37.pdfIn PDF document text
    • http://xufelaketodo.getenjoyment.net/what_is_my_birthday_today.pdfIn PDF document text
    • http://bumasujofoj.getenjoyment.net/55511344586.pdfIn PDF document text
    • http://jedilinosur.mywebcommunity.org/65554365044.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/lixasifasi/tusafubedorexifadow.pdfIn PDF document text
    • http://lawazujazigefon.epizy.com/fononazuloniloserano.pdfIn PDF document text
    • http://mevetilozavasep.epizy.com/bs_daterangepicker_format.pdfIn PDF document text
    • http://regujivabi.rf.gd/19546901570.pdfIn PDF document text
    • https://s3.amazonaws.com/fejakixoweka/30293256368.pdfIn PDF document text
    • http://mapexas.epizy.com/cymera_app_for_pc.pdfIn PDF document text
    • http://ginubav.epizy.com/how_to_add_word_documents_to_wix.pdfIn PDF document text
    • http://pegalisijeg.epizy.com/latest_ugandan_songs.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_off0000f703.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF703 5512 bytes
SHA-256: 19ad1c27ab30aad9915f14ac7824bfe835f9ef1aee5dc3688c17e448fce0d450
font_01_sfnt_off000109d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109D9 10692 bytes
SHA-256: b996e271347388e8fb204dd793afe509466fc063f5f68cec662bc537bfaeb264

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