Malicious PDF — malware analysis report

Static analysis result for SHA-256 01382e74d72c42e2…

MALICIOUS

PDF

75.6 KB Created: 2021-05-01 18:41:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 34bf36da8ebff2e238ba1a18274136fe SHA-1: c89a66734e725c6de2ed7c6a2374f27c4b5d1d83 SHA-256: 01382e74d72c42e20977763622cfd99166f54d86472d6153f04c93572ebcf16c
126 Risk Score

Malware Insights

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

This PDF file is classified as malicious by ML and ClamAV, indicating a phishing attempt. It contains numerous external URIs, with a primary one pointing to 'https://golowaki.ru/strik?utm_term=gap+boy+shoes+size+chart', disguised as a size chart. The document's structure and embedded links suggest it is part of a link farm designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://golowaki.ru/strik?utm_term=gap+boy+shoes+size+chart PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4403406/normal_5fd9fe8ca64d7.pdfIn PDF document text
    • http://info-pages.ru/wopagadukitobm3qfd.pdfIn PDF document text
    • http://sumigemag.mywebcommunity.org/mivobe.pdfIn PDF document text
    • http://dipugipedanam.sportsontheweb.net/school_job_application_letter.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388820/normal_603df4f46805b.pdfIn PDF document text
    • http://autokenn.com/lean_management_techniques_unit_2_answers7rldz.pdfIn PDF document text
    • http://bodyita.space/model_3_standard_range_upgrade06zs5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450502/normal_5fd9b9eb5ee54.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367938/normal_6025eb8fee801.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425491/normal_600e09decdb3a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366382/normal_604d209e0000e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404529/normal_5ffec4a98e006.pdfIn PDF document text
    • http://mixed-rootwork.com/24229977046v2x04.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463266/normal_6035ce4cdca92.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382193/normal_6005bb3a02bde.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472788/normal_601987bbb835e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417429/normal_5fdb5166215d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460983/normal_6066a3590b59f.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/rikolesafuwofar/63242102728.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/tulesutalitabav.pdfIn PDF document text
    • https://s3.amazonaws.com/jebokizez/18641950486.pdfIn PDF document text
    • https://s3.amazonaws.com/gomakobez/rijerebemefukibuwi.pdfIn PDF document text
    • http://nerezusilanake.atwebpages.com/balistica_judiciara.pdfIn PDF document text
    • https://s3.amazonaws.com/xijuxosisomuna/24048681601.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_off0000e917.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE917 5312 bytes
SHA-256: 4ab84bd83f3c8e680b03c4e86d335fb19c99ca595969f0241a94db1b4d627569
font_01_sfnt_off0000fb2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB2F 11072 bytes
SHA-256: 1a46a70cb3dd881bfdbf9e15992d9d649b1e5558ac4859f065ea2dab72a08594

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